try
 {
      using (MemoryStream stream = new MemoryStream())
      {
                path = Server.MapPath(@"\\Files\\"   "file.txt");
                StreamWriter tw = new StreamWriter(path, false, Encoding.GetEncoding("windows-1255"));
                tw.Write("Hello dear file");
               
                tw.Flush();
                tw.Close();
                tw.Dispose();

                stream.Close();
                stream.Dispose();  
            }
        }
        catch (Exception  ex)
        {
            string msg = ex.Message;// Error
            return null;
        }
        return path;

When used again the error is:

The process cannot accsess the file because another process is using the file

How to release the use of the file to enable reuse?

CodePudding user response：

You need to use this pattern everywhere you are working with the file:

    using (_httpClient = new HttpClient())
{
//code to do
}