C#打开文件夹并定位到指定的文件

public void PositionFile(string sFileFullName) 
      { 
          if (!System.IO.File.Exists(sFileFullName)) return; 
  
          System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("Explorer.exe"); 
          //string file = @"c:/windows/notepad.exe"; 
          psi.Arguments = " /select," + sFileFullName; 
          System.Diagnostics.Process.Start(psi); 
      }