//==============================================================================================================================
// Helper for the GetCustomAttribute() family.
//==============================================================================================================================
private static T OneOrNull <T> (this IEnumerable <CustomAttributeData> results) where T : Attribute
{
IEnumerator <CustomAttributeData> enumerator = results.GetEnumerator();
if (!enumerator.MoveNext())
{
return(null);
}
CustomAttributeData result = enumerator.Current;
if (enumerator.MoveNext())
{
throw new AmbiguousMatchException("", null);
}
return((T)(result.Instantiate()));
}