I am using Visual Studio 2013 and C#

I currently have a form which, among other items, has a textbox for the user to enter an id number. I want to be able to 'take' this number and create a text file with the ID number as a file name.

I have been able to write to a file using the OpenFileDialog and Streamwriter, but this requires the user to click the "Save Location" button and browse to a file location, then enter the text for the file they want created.

I would rather have the program create the .txt file based on the id number so that they can just enter their ID and then press enter to start the program.

Is this possible?