C# deleting an open file - closing all files first?

C# VS2008 Windows app

I check a bunch of text files by checking if they exist and searching for and displaying some data. Later I offer the user a chance to delete all the text files but VS studio has an exception that the file is in use? I didn't know I was leaving the files open - can I issue something to close all files at one?

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Karl66Author Commented:
Here is an example -

                  StreamReader sr = File.OpenText(path + @"\tmp\file.txt");
                    while ((input = sr.ReadLine()) != null)
                          <... bunch of searches ...>
                     if (Directory.Exists(path + @"\tmp"))
                        System.IO.Directory.Delete(path + @"\tmp", true); <- says cannot delete \tmp in use

before you try the delete.


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