ManagementObjectSearcher

http://stackoverflow.com/questions/504208/how-to-read-command-line-arguments-of-another-process-in-c

string wmiQuery = string.Format("select CommandLine from Win32_Process where Name='{0}'", processName);

ManagementObjectSearcher searcher = new ManagementObjectSearcher(wmiQuery);

ManagementObjectCollection retObjectCollection = searcher.Get();

foreach (ManagementObject retObject in retObjectCollection)

Console.WriteLine("[{0}]", retObject["CommandLine"]);

http://www.360doc.com/content/14/0704/19/3218170_392034269.shtml