C# Extension method, GetValueOrNull for value type object

Return null if the value type object has default value.

public static T? GetValueOrNull<t>( this T value ) where T : struct
{
   if( value.Equals( default( T ) ) )
      return new Nullable<t>();
   else
      return value;
}
// Usage
int i = default(int); //0
int? i = i.GetValueOrNull();
Console.Writeline( i.HasValue );

// output: false

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