System.Dynamic.Utils.TypeUtils.IsImplicitNumericConversion C# (CSharp) Method

        private static bool IsImplicitNumericConversion(Type source, Type destination)
        {
            TypeCode tcSource = source.GetTypeCode();
            TypeCode tcDest = destination.GetTypeCode();

            switch (tcSource)
            {
                case TypeCode.SByte:
                    switch (tcDest)
                    {
                        case TypeCode.Int16:
                        case TypeCode.Int32:
                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Byte:
                    switch (tcDest)
                    {
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Int16:
                    switch (tcDest)
                    {
                        case TypeCode.Int32:
                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.UInt16:
                    switch (tcDest)
                    {
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Int32:
                    switch (tcDest)
                    {
                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.UInt32:
                    switch (tcDest)
                    {
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Int64:
                case TypeCode.UInt64:
                    switch (tcDest)
                    {
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Char:
                    switch (tcDest)
                    {
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
                case TypeCode.Single:
                    return (tcDest == TypeCode.Double);
            }
            return false;
        }