How to read command line arguments of another process in C#?

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If you did not use the Start method to start a process, the StartInfo property does not reflect the parameters used to start the process. For example, if you use GetProcesses to get an array of processes running on the computer, the StartInfo property of each Process does not contain the original file name or arguments used to start the process. (source: MSDN)

Stuart’s WMI suggestion is a good one:

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"]);

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