The process cannot access the file because it is being used by another procces

Question

I need to remove specific line in txt file which means i need to read and rewrite the whole file leaving out the specific line , i tried but i get unhandled-exeption (The process cannot access the file because it is being used by another procces). All i used in the processes suspicious was :

1 . this line

  IEnumerable<string> text = System.IO.File.ReadAllLines(@"C:\TreeView.txt");

which i used to get all lines into "string"

2. and this part of the method which supposed to delete specific line from txt

           string line = null;
           string filePath = @"c:\TreeView.txt";
   
           using (StreamReader reader = new StreamReader(filePath, true))
   
           {
               using (StreamWriter sw = new StreamWriter(filePath))
               {
                   while ((line = reader.ReadLine()) != null)
                   {
                       if (String.Compare(line, obj) == 0)
                           continue;
   
                       sw.WriteLine(line);
                   }
               }
           }
   

Answer 1

The problem is in the second part where you are opening the file for reading and then trying to open it for writing. You could simply do something like this:

var text = System.IO.File.ReadAllLines(@"C:\TreeView.txt");
System.IO.File.WriteAllLines(@"C:\TreeView.txt",
    text.Where(x => String.Compare(line, obj) != 0));