>>The WHERE restricts the classes it applies to.
>>
>>See possible clauses : http://msdn.microsoft.com/en-us/library/d5x73970.aspx
>>They can be combined - it's an AND combination
>>
>>If you want to use eg between/max, .., you want the type to implement IComparable(T)
>>

>>public static bool Between<T>(this T s, T s1, T s2) where T : IComparable<T>
>>
>>public static T Max<T>(params T[] array) where T : IComparable<T>
>>
>>

>>
>>For an InList you'll need IEquatable(T)
>>

>>public static bool InList<T>(this T s, params T[] array) where T : IEquatable<T>
>>		{
>>			return array.Contains(s);
>>		}
>>

>
>Gregory,
>
>Thanks a lot.
>
>Now I don't understand this
>

>public static T GetNonNull<T>(this  T? value) where T : struct
>		{
>			return value == null ? default(T) : (T)value;
>		}
>

>It says that it could be any value type except for Nullable types. But paramter of the method is Nullable type. Can you explain it then?
>
>Thanks a lot again.


I think it says that T must be a value type. The T? says it accepts the nullable version of the value type