http://blogs.msdn.com/b/xiangfan/archive/2008/09/01/magic-behind-valuetype-equals.aspxIn "Effective C#", Bill Wagner says "Always create an override of ValueType.Equals() whenever you create a value type". His main consideration is the performance, because reflection is needed to compare two value types memberwisely. In fact, the frameworken-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/xiangfan/archive/2008/09/01/magic-behind-valuetype-equals.aspx#8917022Mon, 01 Sep 2008 20:00:51 GMT91d46819-8472-40ad-a661-2c78acb4018c:8917022int19h<p>The question is, why, after 3 major releases of the compiler, C# cannot auto-generate an equivalent fast version of Equals for structs if one is not provided explicitly...</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=8917022" width="1" height="1">