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A string is an object, and so it is passed around by pointers to the memory where it actually exists. &nbsp;<br />
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Null means the pointer points to nothing, that the string doesn't reference any memory. &nbsp;I.e. string b = null; var a = b.Length; throws an exception. &nbsp;Since b is null, there are no methods that work off of it.<br />
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prior to .Net 2.0, there was a difference between .Empty and &quot;&quot;, but now they operate the same.
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Web developer

Tom Knowlton

COG Lead Engineer

Shaun Vermaak

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Thank you... this was very helpful.
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Is null, &quot;&quot;&nbsp;and string.Empty the exact same thing? &nbsp;Please explain your answer.<br />
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<pre><code class="code-1 nolinks" id="code-10-29119941-1"><span>CommonHelpers.LastWorkingProjectID == null || CommonHelpers.LastWorkingProjectID == &quot;&quot; || CommonHelpers.LastWorkingProjectID == string.Empty</span>
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Is null, "" and string.Empty the exact same thing?  Please explain your answer.

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In C#, Is null, &quot;&quot;, and string.Empty the exact same thing described 3 different ways?

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

In C#, Is null, &quot;&quot;, and string.Empty the exact same thing described 3 different ways?

In C#, Is null, "", and string.Empty the exact same thing described 3 different ways?