Searching RichTextBox and deleting all between

I'm having a little trouble trying to figure out how to search all the text in my RichTextBox and delete everything between the parentheses (including the parentheses). I have a lot of files with different comments wrote in the parentheses that may have different text in them.

Example : This is my text in the text box (AS YOU CAN SEE HERE). I am wanting to be able to read the entire text box (This would be another comment) and delete the out.

Result: This is my text in the text box. I am wanting to be able to read the entire text box and delete the out.

The rich text box are usually longer files than just a couple lines. Any help would be gratefully appreciated.


You can use a regular expression for this:

Regex r = new Regex("\(.+?\)");

If you are using a richtextbox or a textbox:

rtb.Text = r.Replace(rtb.Text,"");

You can do this without reading the file into the richttextbox:

string filetext = File.ReadAllText("file.txt");
filetext = r.Replace(filetext,"");

Or in one line:


You can loop all files in a directory:

foreach(string file in Directory.GetFiles(targetDirectory)

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