C# - WMI Getter

public static string GetOsServicePack() {
  return GetWMIInfo("Win32_OperatingSystem",   "CSDVersion");
}

private static string GetWMIInfo(string sSegment, string sInfo) {
  string sSearchFile = "";
  ManagementClass  cimobject = new ManagementClass(sSegment);
  ManagementObjectCollection  moc = cimobject.GetInstances();
  foreach(ManagementObject mo in moc) {
    foreach(PropertyData s in mo.Properties) {
      try {
	if(s.Name.Equals(sInfo)) { 
	  sSearchFile = mo[s.Name].ToString();
	}
      }
      catch(System.NullReferenceException) {  
        continue; 
      }
    }
  }
  return sSearchFile.Trim();
}