MSBuild:如何检查进程是否存在？

using System.Diagnostics;

public static bool IsProcessRunning(string processName)
{
    Process[] processes = Process.GetProcessesByName(processName);
    return processes.Length > 0;
}

using System.Management;

public static bool IsProcessRunning(string processName)
{
    string query = string.Format("SELECT * FROM Win32_Process WHERE Name='{0}'", processName);
    ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
    ManagementObjectCollection processList = searcher.Get();

    return processList.Count > 0;
}

using System.ServiceProcess;

public static bool IsProcessRunning(string processName)
{
    ServiceController[] services = ServiceController.GetServices();
    foreach (ServiceController service in services)
    {
        if (service.ServiceName.Equals(processName))
        {
            return true;
        }
    }

    return false;
}