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    <blockquote> <p>Why is the default value of the string type null instead of an empty string?</p> </blockquote> <p>Because <code>string</code> is a <strong>reference type</strong> and the default value for all reference types is <code>null</code>. </p> <blockquote> <p>It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper(), StartWith() etc...</p> </blockquote> <p>That is consistent with the behaviour of reference types. Before invoking their instance members, one should put a check in place for a null reference.</p> <blockquote> <p>If the default value of string were the empty string, I would not have to test, and I would feel it to be more consistent with the other value types like int or double for example.</p> </blockquote> <p>Assigning the default value to a specific reference type other than <code>null</code> would make it <strong>inconsistent</strong>.</p> <blockquote> <p>Additionally <code>Nullable&lt;String&gt;</code> would make sense.</p> </blockquote> <p><a href="http://msdn.microsoft.com/en-us/library/1t3y8s4s%28v=vs.110%29.aspx" rel="noreferrer"><code>Nullable&lt;T&gt;</code></a> works with the value types. Of note is the fact that <code>Nullable</code> was not introduced on the original <a href="http://msdn.microsoft.com/en-us/library/b3h38hb0(v=vs.80).aspx" rel="noreferrer">.NET platform</a> so there would have been a lot of broken code had they changed that rule.(<em>Courtesy <a href="https://stackoverflow.com/users/109749/jcolebrand">@jcolebrand</a>)</em></p>
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    1. POWhy is the default value of the string type null instead of an empty string?
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    1. COBut string has special support in several areas (string literals) so it could have been implemented (easily).
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    2. CO@HenkHolterman One could implement a whole ton of things, but why introduce such a glaring inconsistency?
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    3. CO@delnan - "why" was the question here.
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