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    <p>Since answer has already been given, let me just explain why your original code didn't work for you:</p> <blockquote> <p>Which, seems strange because you should be able to do the above operations based on the where T : struct constraint on the method.</p> </blockquote> <p>Not really. You can have raw pointers to <em>unmanaged types</em>. This is defined as follows in the C# language spec (18.2):</p> <blockquote> <p>Unlike references (values of reference types), pointers are not tracked by the garbage collector — the garbage collector has no knowledge of pointers and the data to which they point. For this reason a pointer is not permitted to point to a reference or to a struct that contains references, and the referent type of a pointer must be an <em>unmanaged-type</em>. An <em>unmanaged-type</em> is any type that isn’t a reference-type and doesn’t contain reference-type fields at any level of nesting. In other words, an <em>unmanaged-type</em> is one of the following:</p> <ul> <li><code>sbyte</code>, <code>byte</code>, <code>short</code>, <code>ushort</code>, <code>int</code>, <code>uint</code>, <code>long</code>, <code>ulong</code>, <code>char</code>, <code>float</code>, <code>double</code>, <code>decimal</code>, or <code>bool</code>.</li> <li>Any <em>enum-type</em>.</li> <li>Any <em>pointer-type</em>.</li> <li>Any user-defined <em>struct-type</em> that contains fields of <em>unmanaged-types</em> only.</li> </ul> </blockquote> <p>So there are quite a few restrictions, and for a generic method, <code>T:struct</code> may or may not conform to them for any particular instantiation, so construct like <code>T*</code> is illegal. It would be nice to have a special generic type parameter constraint to cover unmanaged types, but as it stands, there isn't one in the CLR.</p>
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    1. POGeneric BitConverter-like method?
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    1. USPavel Minaev
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    1. COAh I see. I never considered that a struct constraint could potentially allow other sorts of managed types into the mix. Thanks for the explanation!
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      1. USRyan Stecker
 

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