public static void ProcessFiles(string file1, string file2, string file3, string file_out)
		{
			//int counter = 0;
			string line1, line2, line3;

			//Open a text file for reading
			System.IO.StreamReader str_file1 = new System.IO.StreamReader(file1);
			System.IO.StreamReader str_file2 = new System.IO.StreamReader(file2);
			System.IO.StreamReader str_file3 = new System.IO.StreamReader(file3);

			System.IO.StreamWriter file_final = new System.IO.StreamWriter(file_out);

			// Read the file and add it to the datagridview, if google related
			while (((line1 = str_file1.ReadLine()) != null) && ((line2 = str_file2.ReadLine()) != null) 
				&& ((line3 = str_file3.ReadLine()) != null))
			{
				file_final.WriteLine(line1 + line2 + line3);
			}

			str_file1.Close();
			str_file2.Close();
			str_file3.Close();
			file_final.Close();
		}