probniyDE/Switcher.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;

namespace Khaustov_ProbniyDE
{
    class Switcher
    {
        public static Frame MainFrame 
        { 
            get; 
            set; 
        }
    }
}