URI Format Not supported

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C#

I am trying to copy file from server to local system application folder but it shows exception URI format not supported at System.IO.Path.NormalizePath etc ....

Error may be at System.IO.File.Copy(sourceFile, destFile, true)

here is the code

public static void copyFilestoStart()
       {

           string fileName = "MLScreenCapturePXT.dll";
           string sourcePath = "http://www.mywebsite.com/temp/New Task";
         
          

           string tPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);

        

           string targetPath = tPath + "\\IBM";

         
           string sourceFile = System.IO.Path.Combine(sourcePath, fileName);
           string destFile = System.IO.Path.Combine(targetPath, fileName);
  
          
           if (!System.IO.Directory.Exists(targetPath))
           {
               System.IO.Directory.CreateDirectory(targetPath);

           }

           System.IO.File.Copy(sourceFile, destFile, true);

          
           if (System.IO.Directory.Exists(sourcePath))
           {
               string[] files = System.IO.Directory.GetFiles(sourcePath);

               // Copy the files and overwrite destination files if they already exist.
               foreach (string s in files)
               {
                   // Use static Path methods to extract only the file name from the path.
                   fileName = System.IO.Path.GetFileName(s);
                   destFile = System.IO.Path.Combine(targetPath, fileName);

                   System.IO.File.Copy(s, destFile, true);


               }


           }
           else
           {
               MessageBox.Show("Source path does not exist!");

           }


          
           MessageBox.Show("Application Configured ...!!!!");
           Application.Exit();



       }