Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
How can I delete a specific Excel File in my own directory using C#?
You already have the correct verb[^].
speaking as ...
if (System.IO.File.Exists(physicalpath+filename)) { System.IO.File.Delete(physicalpath+filename); }