Delete existing files in ASP.Net

using System.IO;

string filePath = Request.PhysicalApplicationPath + "Download\\";

DirectoryInfo dirInfo = new DirectoryInfo(filePath);

FileInfo[] fileInfo = dirInfo.GetFiles();

foreach (FileInfo file in fileInfo)

{

    string ext = file.Extension;

    if (ext == ".txt")

    {

        file.Delete();

    }

}

Note:-

Currently deleting only text files.

Delete all files in Download folder.

foreach (FileInfo file in fileInfo)

{

    file.Delete();

}

Delete only specified file in Download folder.

foreach (FileInfo file in fileInfo)

{

    string fileName = file.Name;

    if (fileName == "abc.txt")

    {

        file.Delete();

    }

}

Or

string filePath = Server.MapPath("~/Download") + "abc.txt";

if (File.Exists(filePath))

{

    File.Delete(filePath);

}