C# Copy a file to another location with a different name

System.IO.File.Copy(oldPathAndName, newPathAndName);

You may also try the Copy method:

File.Copy(@"c:\work\foo.txt", @"c:\data\bar.txt")

Use the File.Copy method instead

eg.

File.Copy(@"C:\oldFile.txt", @"C:\newFile.txt");

You can call it whatever you want in the newFile, and it will rename it accordingly.

If you want to use only FileInfo class try this

             string oldPath = @"C:\MyFolder\Myfile.xyz";
             string newpath = @"C:\NewFolder\";
             string newFileName = "new file name";
             FileInfo f1 = new FileInfo(oldPath);
           if(f1.Exists)
             {
                if(!Directory.Exists(newpath))
                {
                    Directory.CreateDirectory(newpath); 
                }
                 f1.CopyTo(string.Format("{0}{1}{2}", newpath, newFileName, f1.Extension));
             }