C# 报不支持给定路径的格式

看了网上很多解决方法，能力不够，没找出来，因此来找da 佬解决一下
string fullFileName = “‪C:\Users\XH-Chamber\Desktop\RXr.csv”;
string fullFileName = @“‪C:\Users\XH-Chamber\Desktop\RXr.csv”;
string fullFileName = "‪C:/Users/XH-Chamber/Desktop/RXr.csv";
这三种路径方式都尝试过了
FileStream fs = new FileStream(fullFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);

这样呢？

var desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
var filePath = Path.Combine(desktopPath, "RXr.csv");

https://www.cnblogs.com/zbw911/p/3541319.html
看看这个