Presentation Model (MVVM) Good Practices

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Castle.Core.Interceptor;
using System.Threading;
using PresentationModelBase;
using System.ComponentModel;

namespace App.Configuration
{
    class BackgroundWorkInterceptor : IInterceptor
    {
        #region IInterceptor Members

        public void Intercept(IInvocation invocation)
        {
            if (!CheckIfShouldIntercept(invocation))
            { invocation.Proceed(); return; }

            PresentationModel pm = (PresentationModel)invocation.InvocationTarget;

            ThreadPool.QueueUserWorkItem(
                o =>
                {
                    SetIsWorkingProperty(pm, true);
                    invocation.Proceed();
                    SetIsWorkingProperty(pm, false);
                });
        }

        #endregion

        void SetIsWorkingProperty(PresentationModel pm, bool value)
        {
            var property =
                TypeDescriptor.GetProperties(typeof(PresentationModel)).Find("IsWorking", false);
            property.SetValue(pm, value);
        }

        bool CheckIfShouldIntercept(IInvocation invocation)
        {
            if (invocation.Method.Name == "InvokeMethod")
                return true;
            return false;
        }
    }
}