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Generic method to get the enum value by string or int in C#

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<span style="font-family: Verdana, sans-serif;"><span style="color: grey;">Following is the method in C# to get the enum value by string </span><span style="color: grey;">    </span></span><span style="color: grey; font-family: Consolas; font-size: 9.5pt;">   </span></h2>
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<span style="color: grey; font-family: Consolas; font-size: 9.5pt;">        ///</span><span style="color: green; font-family: Consolas; font-size: 9.5pt;"> </span><span style="color: grey; font-family: Consolas; font-size: 9.5pt;"><summary></summary></span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> Method to get
enumeration value from string value.</span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"></span></span></div>
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<o:p></o:p><div class="MsoNormal">
<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><typeparam name="T"></typeparam></span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><param name="str" /></span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><returns></returns><o:p></o:p></span></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">public</span>  T GetEnumValue<t>(<span style="color: blue;">string</span> str) <span style="color: blue;">where</span> T :
<span style="color: blue;">struct</span>, <span style="color: #2b91af;">IConvertible</span><o:p></o:p></t></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">if</span> (!<span style="color: blue;">typeof</span>(T).IsEnum)<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
<span style="color: blue;">throw</span> <span style="color: blue;">new</span> <span style="color: #2b91af;">Exception</span>(<span style="color: #a31515;">"T must
be an Enumeration type."</span>);<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
}<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
T val = ((T[])<span style="color: #2b91af;">Enum</span>.GetValues(<span style="color: blue;">typeof</span>(T)))[0];<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">if</span> (!<span style="color: blue;">string</span>.IsNullOrEmpty(str))<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
<span style="color: blue;">foreach</span> (T enumValue <span style="color: blue;">in</span>
(T[])<span style="color: #2b91af;">Enum</span>.GetValues(<span style="color: blue;">typeof</span>(T)))<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                   
<span style="color: blue;">if</span>
(enumValue.ToString().ToUpper().Equals(str.ToUpper()))<o:p></o:p></span></div>
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{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                       
val = enumValue;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                       
<span style="color: blue;">break</span>;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                   
}<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
}<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
}<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">return</span> val;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div>
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<h2 style="text-align: left;">
<span style="color: grey; font-family: Verdana, sans-serif;">Following is the method in C# to get the enum value by int.</span></h2>
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<span style="color: grey; font-family: Consolas; font-size: 9.5pt;"><br /></span></div>
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<span style="color: grey; font-family: Consolas; font-size: 9.5pt;">        ///</span><span style="color: green; font-family: Consolas; font-size: 9.5pt;"> </span><span style="color: grey; font-family: Consolas; font-size: 9.5pt;"><summary></summary></span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> Method to get
enumeration value from int value.</span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"></span></span></div>
<o:p></o:p><div class="MsoNormal">
<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><typeparam name="T"></typeparam></span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><param name="str" /></span><o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: grey;">///</span><span style="color: green;"> </span><span style="color: grey;"><returns></returns><o:p></o:p></span></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">public</span> T GetEnumValue<t>(<span style="color: blue;">int</span> intValue) <span style="color: blue;">where</span> T
: <span style="color: blue;">struct</span>, <span style="color: #2b91af;">IConvertible</span><o:p></o:p></t></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">if</span> (!<span style="color: blue;">typeof</span>(T).IsEnum)<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
<span style="color: blue;">throw</span> <span style="color: blue;">new</span> <span style="color: #2b91af;">Exception</span>(<span style="color: #a31515;">"T must
be an Enumeration type."</span>);<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
}<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
T val = ((T[])<span style="color: #2b91af;">Enum</span>.GetValues(<span style="color: blue;">typeof</span>(T)))[0];<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">foreach</span> (T enumValue <span style="color: blue;">in</span>
(T[])<span style="color: #2b91af;">Enum</span>.GetValues(<span style="color: blue;">typeof</span>(T)))<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
<span style="color: blue;">if</span> (<span style="color: #2b91af;">Convert</span>.ToInt32(enumValue).Equals(intValue))<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
{<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                   
val = enumValue;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">                   
<span style="color: blue;">break</span>;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">               
}             
<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">           
<span style="color: blue;">return</span> val;<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt;">    }<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: x-small;"> </span><span style="font-family: Verdana, sans-serif;">If I have an enum as follows:</span><span style="font-family: Verdana, sans-serif;">  </span></div>
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<span style="font-family: Verdana, sans-serif;"><br /></span></div>
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<span style="font-family: Verdana, sans-serif;"> </span><span style="font-family: Consolas; font-size: 9.5pt;">  </span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">public</span><span style="font-family: Consolas; font-size: 9.5pt;"> </span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">enum</span><span style="font-family: Consolas; font-size: 9.5pt;"> </span><span style="color: #2b91af; font-family: Consolas; font-size: 9.5pt;">TestEnum</span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">    {<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">        Value1 = 1,<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">        Value2 = 2, <o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">        Value3 = 3<o:p></o:p></span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">    }<o:p></o:p></span></div>
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<span class="Apple-tab-span" style="white-space: pre;"><span style="font-family: Verdana, sans-serif;"> </span></span></div>
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<span style="font-family: Verdana, sans-serif;"> then I can make use of above methods as </span></div>
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<span style="font-family: Verdana, sans-serif;">  </span><span style="font-family: Consolas; font-size: 9.5pt;">  </span><span style="color: #2b91af; font-family: Consolas; font-size: 13px;">T</span><span style="color: #2b91af; font-family: Consolas; font-size: 9.5pt;">estEnum</span><span style="font-family: Consolas; font-size: 9.5pt;">
reqValue = GetEnumValue<</span><span style="color: #2b91af; font-family: Consolas; font-size: 9.5pt;">TestEnum</span><span style="font-family: Consolas; font-size: 9.5pt;">>(</span><span style="color: #a31515; font-family: Consolas; font-size: 9.5pt;">"Value1"</span><span style="font-family: Consolas; font-size: 9.5pt;">);  // Output: Value1</span></div>
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<span style="font-family: Consolas; font-size: 9.5pt; mso-bidi-language: HI;">    <span style="color: #2b91af;">TestEnum</span>
reqValue2 = GetEnumValue<<span style="color: #2b91af;">TestEnum</span>>(2);       // OutPut: Value2<o:p></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;">Hope this will help. Happy Coding.</span></div>
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Difference between var , object and dynamic variable in C#

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<span style="font-family: Verdana, sans-serif;">In this post I am going to write the points about the three type of the <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">Object</span>, <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">Var</span> and Dynamic. Most of the developer not able to get what is <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">difference</span> between this three kind of <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable.</span></div>
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<span style="font-family: Verdana, sans-serif;"><br /></span></div>
<table class="ArticleTable" style="background-color: white; border-collapse: collapse; border-left-color: rgb(204, 204, 204); border-left-style: solid; border-top-color: rgb(204, 204, 204); border-top-style: solid; border-width: 1px 0px 0px 1px; color: #111111; margin: 0px; padding: 0px;"><thead style="background-color: #ebf6ff; border: 0px; font-weight: bold; margin: 0px; padding: 0px;">
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; margin: 0px; padding: 0px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Object</span></span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Dynamic</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; margin: 0px; padding: 0px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Var</span></span></td></tr>
</thead><tbody style="border: 0px; margin: 0px; padding: 0px;">
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Can able to store any kind of value, because <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span> is the base class of all type in .net framework.</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Can able to store any type of the <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable, similar to old VB language <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable.</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Can able to store any type of value but it require to initialize at the time of declaration.<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjXNeTs1EpDXssAjZGh53c6Fwh2Sd1M3KDOzR2pL_BideMheAMaInT5ByEA__YawZCoBFOqi_ZiBgrrh3qxv0khn9Lyc7pw3L0j_b-ze0EpGIZrsDdMWAdxnxH3NIZTmZPKrRvU9kpgwq1_/s1600/var+inialize+error.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="80" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjXNeTs1EpDXssAjZGh53c6Fwh2Sd1M3KDOzR2pL_BideMheAMaInT5ByEA__YawZCoBFOqi_ZiBgrrh3qxv0khn9Lyc7pw3L0j_b-ze0EpGIZrsDdMWAdxnxH3NIZTmZPKrRvU9kpgwq1_/s320/var+inialize+error.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="320" /></a></span></td></tr>
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Compiler has little information about the type<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGmDacPcHcvdx3j8T-NHOf8s6zpRDKc820a-HqPHKf4_fbWkeQmqsXHrgg48dzS38kiUNx9DOd3fEOhPqAIXxaREofW34GxYdrddGqAX5RW2E5f9im0pjFvZgUXMOmNHNlD0JkH48isKi9/s1600/object.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="44" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGmDacPcHcvdx3j8T-NHOf8s6zpRDKc820a-HqPHKf4_fbWkeQmqsXHrgg48dzS38kiUNx9DOd3fEOhPqAIXxaREofW34GxYdrddGqAX5RW2E5f9im0pjFvZgUXMOmNHNlD0JkH48isKi9/s200/object.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Compiler doesn't have any information about the this type of <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable.<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKa4vWKJEFZspot_TkLHL6JqCK9CQmCdfvkcl6SeVf4pE3fRAGFOLWsEK7LbCPgNIw5OVGhV4zdI87Ap3Gp7fl662KfbecH2pj6K5vuOEtGhHpDbmvHTiJltNji138zIUToyx3IhVOGmYW/s1600/dynamic.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="83" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKa4vWKJEFZspot_TkLHL6JqCK9CQmCdfvkcl6SeVf4pE3fRAGFOLWsEK7LbCPgNIw5OVGhV4zdI87Ap3Gp7fl662KfbecH2pj6K5vuOEtGhHpDbmvHTiJltNji138zIUToyx3IhVOGmYW/s200/dynamic.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">It's compiler safe i.e compiler has all information about the stored value, so that it doesn't cause any issue at run-time.<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4wCDo772yFcHN2WGnUcPMAoQ_h2Rk2xhHVmzBkUeuo8lwa_sh_uCN3WWksVzZi1GCQ7g1miUiLpXK8rNqJJzLrBon6Vvkw_52noMJEYV0nOpebX79EsTZY-oHkzl9xHx2EenTaBk77MnG/s1600/var+compiler.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="56" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4wCDo772yFcHN2WGnUcPMAoQ_h2Rk2xhHVmzBkUeuo8lwa_sh_uCN3WWksVzZi1GCQ7g1miUiLpXK8rNqJJzLrBon6Vvkw_52noMJEYV0nOpebX79EsTZY-oHkzl9xHx2EenTaBk77MnG/s200/var+compiler.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td></tr>
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;"><span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">Object</span> type can be passed as function argument and function also can return <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span> type</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Dynamic type can be passed as function argument and function also can return <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span>type</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;"><span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">Var</span> type can not be passed as function argument and function can not return<span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span> type. This type of<span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable can work in the scope where it defined.<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyHyn91Hi57UiaHnbyuzHXduARng3PRbGTBeOa0zz_atQyGE0ludp3YCMXRqNmF1oZUfRa-8qtGxxAtiSVrozvNXhGQ2YtqhDwNzO5Te5KWHMBpKiloIfev7g0GOIOTHiBsozO2B1ZTduV/s1600/var+passing+argument.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="30" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyHyn91Hi57UiaHnbyuzHXduARng3PRbGTBeOa0zz_atQyGE0ludp3YCMXRqNmF1oZUfRa-8qtGxxAtiSVrozvNXhGQ2YtqhDwNzO5Te5KWHMBpKiloIfev7g0GOIOTHiBsozO2B1ZTduV/s200/var+passing+argument.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td></tr>
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Require to cast <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span> <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">var</span>iable to original type before using it. So this assigning to <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span> type and converting to original type called as Boxing and Un-Boxing for value type and for the reference type its casting of types. It's actually increasing the overhead when we do this both operation.<br />Allows to perform operation of given type once it get cast any user defined or primitive data type.</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Casting is not require but you need to know the property and methods related to stored type</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">No need to cast because compiler has all information to perform operation.</span></td></tr>
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Cause the problem at run time if the stored value is not get converted to underlying data type.<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeSJSX4QW6ZRH1vnZtH86OlpydmsHwm7qcNjYLcQX3rYxKsR6mVQtqCWNaMssrswSZZI7g9UUEKikpVt2ul8g7AaGtcLrvesZLtbxPJO7jlIuOQJHQFNzbOTKGVnSCkpaBep58dHwmfvT7/s1600/Object+error.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px;"><img border="0" height="68" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeSJSX4QW6ZRH1vnZtH86OlpydmsHwm7qcNjYLcQX3rYxKsR6mVQtqCWNaMssrswSZZI7g9UUEKikpVt2ul8g7AaGtcLrvesZLtbxPJO7jlIuOQJHQFNzbOTKGVnSCkpaBep58dHwmfvT7/s200/Object+error.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Cause problem if the wrong method or property accessed because all the information about stored value is get resolve only at run time<br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGMRTQAbR7_Q9iQgbfyUAJTYoUFYDGeRW8u6h6LkvKYBuaThiZe6xptODQY4a-asKJFQRh5U_lQokFxd1NoptiBP9kh0dE9gAxIJls3xvFVdJMaH__gYPBHSlku89Gyh9BQ3P9AAhPZ0Sc/s1600/dynamic+error.JPG" style="border: 0px; color: purple; margin: 0px; padding: 0px; text-decoration: none;"><img border="0" height="73" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGMRTQAbR7_Q9iQgbfyUAJTYoUFYDGeRW8u6h6LkvKYBuaThiZe6xptODQY4a-asKJFQRh5U_lQokFxd1NoptiBP9kh0dE9gAxIJls3xvFVdJMaH__gYPBHSlku89Gyh9BQ3P9AAhPZ0Sc/s200/dynamic+error.JPG" style="border: 0px; height: auto; margin: 0px; max-width: 100%; overflow: auto; padding: 0px;" t="" true="" width="200" /></a></span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Doesn't cause problem because compiler has all info about stored value.</span></td></tr>
<tr style="border: 0px; font-size: 14px; margin: 0px; padding: 0px;"><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Useful when doesn't have more information about the data type.</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Useful when coding using reflection or dynamic language support or with the COM <span class="search-highlight" style="border-bottom-color: rgb(255, 153, 0); border-bottom-style: dotted; border-width: 0px 0px 1px; font-weight: bold; margin: 0px; padding: 0px;">object</span>s, because we require to write less amount of code.</span></td><td style="border-bottom-color: rgb(204, 204, 204); border-bottom-style: solid; border-right-color: rgb(204, 204, 204); border-right-style: solid; border-width: 0px 1px 1px 0px; font-size: 14px; margin: 0px; padding: 5px;"><span style="font-family: Verdana, sans-serif; font-size: small;">Useful when getting result out of the linq queries. In 3.5 framework it introduce to support linq feature.<br /></span></td></tr>
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Reference : <a href="http://www.codeproject.com/Articles/233553/Difference-between-Object-Dynamic-and-Var">Code Project</a></div>

Difference between var , object and dynamic variable in C#

In this post I am going to write the points about the three type of the var iable Object , Var and Dynamic. Most of the developer not...

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