如果您正在使用FileStream读取该文件，然后想要删除它，请确保在调用file . delete (path)之前关闭FileStream。我有这个问题。

var filestream = new System.IO.FileStream(@"C:\Test\PutInv.txt", System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
filestream.Close();
File.Delete(@"C:\Test\PutInv.txt");

  if (System.IO.File.Exists(@"C:\Users\Public\DeleteTest\test.txt"))
    {
        // Use a try block to catch IOExceptions, to 
        // handle the case of the file already being 
        // opened by another process. 
        try
        {
            System.IO.File.Delete(@"C:\Users\Public\DeleteTest\test.txt");
        }
        catch (System.IO.IOException e)
        {
            Console.WriteLine(e.Message);
            return;
        }
    }

像这样使用System.IO.File.Delete:

System.IO.File.Delete(@“C: \用法”)

从文档中可以看到:

如果要删除的文件不存在，则不会抛出异常。

if (File.Exists(Path.Combine(rootFolder, authorsFile)))    
{    
// If file found, delete it    
File.Delete(Path.Combine(rootFolder, authorsFile));    
Console.WriteLine("File deleted.");    
} 

动态

 string FilePath = Server.MapPath(@"~/folder/news/" + IdSelect)
 if (System.IO.File.Exists(FilePath + "/" + name+ ".jpg"))
   {
    System.IO.File.Delete(FilePath + "/" + name+ ".jpg");
   }

删除目录下的所有文件

string[] files = Directory.GetFiles(rootFolder);    
foreach (string file in files)    
{    
File.Delete(file);    
Console.WriteLine($"{file} is deleted.");    
}

if (File.Exists(path))
{
    File.Delete(path);
}

if (System.IO.File.Exists(@"C:\test.txt"))
    System.IO.File.Delete(@"C:\test.txt"));

but

System.IO.File.Delete(@"C:\test.txt");

只要文件夹存在，就会这样做。