获取MethodCallExpression的参数值

using System;
using System.Linq.Expressions;

class Program
{
    static void Main()
    {
        Expression<Func<int, int, int>> expression = (x, y) => x + y;

        // 获取 MethodCallExpression
        MethodCallExpression methodCall = (MethodCallExpression)((BinaryExpression)expression.Body).Left;

        // 获取参数值
        ParameterExpression param1 = (ParameterExpression)methodCall.Arguments[0];
        ParameterExpression param2 = (ParameterExpression)methodCall.Arguments[1];

        Console.WriteLine($"Parameter 1: {param1.Name}");
        Console.WriteLine($"Parameter 2: {param2.Name}");
    }
}

if (expression.Body is BinaryExpression binaryExpression)
{
    if (binaryExpression.Left is MethodCallExpression methodCall)
    {
        if (methodCall.Arguments.Count >= 2)
        {
            ParameterExpression param1 = (ParameterExpression)methodCall.Arguments[0];
            ParameterExpression param2 = (ParameterExpression)methodCall.Arguments[1];

            Console.WriteLine($"Parameter 1: {param1.Name}");
            Console.WriteLine($"Parameter 2: {param2.Name}");
        }
        else
        {
            Console.WriteLine("参数数量不足");
        }
    }
    else
    {
        Console.WriteLine("表达式类型不匹配");
    }
}
else
{
    Console.WriteLine("表达式类型不匹配");
}