IsEnumDefined()

override bool System.RuntimeType.IsEnumDefined ( object value )

inlinevirtual

Reimplemented from System.Type.

Definition at line 3570 of file RuntimeType.cs.

    {
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        if (!IsEnum)
        {
            throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
        }
        RuntimeType runtimeType = (RuntimeType)value.GetType();
        if (runtimeType.IsEnum)
        {
            if (!runtimeType.IsEquivalentTo(this))
            {
                throw new ArgumentException(SR.Format(SR.Arg_EnumAndObjectMustBeSameType, runtimeType, this));
            }
            runtimeType = (RuntimeType)runtimeType.GetEnumUnderlyingType();
        }
        if (runtimeType == StringType)
        {
            string[] array = Enum.InternalGetNames(this);
            object[] array2 = array;
            return Array.IndexOf(array2, value) >= 0;
        }
        if (Type.IsIntegerType(runtimeType))
        {
            RuntimeType runtimeType2 = Enum.InternalGetUnderlyingType(this);
            if (runtimeType2 != runtimeType)
            {
                throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, runtimeType, runtimeType2));
            }
            ulong[] array3 = Enum.InternalGetValues(this);
            ulong value2 = Enum.ToUInt64(value);
            return Array.BinarySearch(array3, value2) >= 0;
        }
        throw new InvalidOperationException(SR.InvalidOperation_UnknownEnumType);
    }

References System.SR.Arg_EnumAndObjectMustBeSameType, System.SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, System.SR.Arg_MustBeEnum, System.array, System.Array.BinarySearch(), System.SR.Format(), System.Array.IndexOf(), System.Enum.InternalGetNames(), System.Enum.InternalGetUnderlyingType(), System.Enum.InternalGetValues(), System.SR.InvalidOperation_UnknownEnumType, System.Type.IsIntegerType(), System.Enum.ToUInt64(), and System.value.