C#判断VS是否处于设计模式

public class CheckDesingModel
    {
        public static bool IsDesingMode()
        {
            bool ReturnFlag = false;
            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
                ReturnFlag = true;
            else if (System.Diagnostics.Process.GetCurrentProcess().ProcessName == "devenv")
                ReturnFlag = true;
            //if (ReturnFlag)
            //    Msg.Warning("设计模式");
            //else Msg.Warning("非设计模式！");
            return ReturnFlag;
        }
    }