System.Linq.Expressions.Expression.GetUserDefinedBinaryOperatorOrThrow C# (CSharp) Method

        private static BinaryExpression GetUserDefinedBinaryOperatorOrThrow(ExpressionType binaryType, string name, Expression left, Expression right, bool liftToNull)
        {
            BinaryExpression b = GetUserDefinedBinaryOperator(binaryType, name, left, right, liftToNull);
            if (b != null)
            {
                ParameterInfo[] pis = b.Method.GetParametersCached();
                ValidateParamswithOperandsOrThrow(pis[0].ParameterType, left.Type, binaryType, name);
                ValidateParamswithOperandsOrThrow(pis[1].ParameterType, right.Type, binaryType, name);
                return b;
            }
            throw Error.BinaryOperatorNotDefined(binaryType, left.Type, right.Type);
        }