How to delete an uploaded image in asp.net

File/Image Updation or delete it using C#.Net , Asp.Net

        //      FILE OR IMAGE DELETION AND CREATION ( Use for delete the Image) (UPDATING
// THE PREVIOUS FILE using c#.net , asp.net


using System.Drawing;
using System.IO;


public void filedel()         
    {
        string path = Server.MapPath(@"images\");
        string imgurl = path + "a.jpg";
        try
        {
            FileInfo TheFile = new FileInfo(imgurl);
            if (TheFile.Exists)
            {
                File.Delete(imgurl);   // It not works if file is used in another process
            }
            else
            {
               // File.Create(imgurl);  
            //or
            // Code To Create image
            Bitmap bmp = new Bitmap(2, 2);
            bmp.Save(imgurl, System.Drawing.Imaging.ImageFormat.Jpeg);
            bmp.Dispose();
            }
            Label1.Text = "Sucess";
        }
        catch (Exception ex)
        {
            Label1.Text = ex.Message;
        }
    }