title: Opening an excel file from button click on a windows form
body: <pre><code>private void btnOpenReport_Click(object sender, EventArgs e)
  {  
      if (System.IO.File.Exists(outputFilePath))
      {
          Process.Start(new ProcessStartInfo("excel.exe", " /select, " + outputFilePath.Replace("\\\\", "\\")));
       }
  }
  </code></pre>