[C#] Get the cmdline from a different process

We can use Win32_Process management object to get the command line. For example,

var query = 
    "select CommandLine from Win32_Process where ...";

using (var searcher = new ManagementObjectSearcher(query)) {
  foreach (var result in searcher.Get()) {
    // The desired cmdline is (String)result["CommandLine"]
  }
}

Before using Win32_Process, we should add System.Management.dll to the reference. Surely, we can wrap up the sample code in a function.