System.RuntimeTypeInfo.IsPrimitiveImpl C# (CSharp) Method

        protected override bool IsPrimitiveImpl()
        {
            return (typeCode == TypeCode.Boolean
                || typeCode == TypeCode.Char
                || (typeCode >= TypeCode.I && typeCode <= TypeCode.I8)
                || (typeCode >= TypeCode.U && typeCode <= TypeCode.U8)
                || typeCode == TypeCode.R4
                || typeCode == TypeCode.R8);
        }