public static  class Class1
{
    private static string _Name;

    public static string Name
    {
        get { return Class1._Name; }
        set { Class1._Name = value; }
    }
} 


                    string str = "Class1.Name";
        //Class1.Name是一个静态变量
        //把静态变量名放到str
        //想问一下怎么操作 str 才能给Class1.Name赋值

问题解决的话，请点下采纳

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;

namespace Q1079622
{

    public static class Class1
    {
        private static string _Name;

        public static string Name
        {
            get { return Class1._Name; }
            set { Class1._Name = value; }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            string s = "Class1.Name";
            string val = "newval";
            var type = Assembly.GetExecutingAssembly().GetTypes().First(x => x.Name == s.Split('.')[0]);
            var a = type.GetProperties();
            var prop = type.GetProperty(s.Split('.')[1]);
            prop.SetValue(null, val, null);
            Console.WriteLine(Class1.Name);
        }
    }
}