/// <summary>
/// Return the first process id with matching values in the command line.
/// </summary>
/// <param name="args">
/// Values in the command line to match (case insensitive).
/// </param>
/// <returns>
/// The process id of the first matching process found; null on no match.
/// </returns>
public static int? ProcessIdOf(params string[] args)
{
    using (var mos = new ManagementObjectSearcher(
        "SELECT ProcessId,CommandLine FROM Win32_Process"))
    {
        foreach (ManagementObject mo in mos.Get())
        {
            var commandLine = (string)mo["CommandLine"] ?? string.Empty;
            for (int i = 0;; ++i)
            {
                if (i == args.Length)
                {
                    return int.Parse(mo["ProcessId"].ToString());
                }

                if (commandLine.IndexOf(
                       args[i],
                       StringComparison.InvariantCultureIgnoreCase) == -1)
                {
                    break;
                }
            }
        }
    }

    return null;
}