using System;

using System.ComponentModel;

 public class Test

{

    public string Name

    {

        get { return m_name; }

        set

        {

            m_name = value;

            SetNameInternal();

        }

    }

​

    void SetNameInternal()

    {

        throw new Exception("Ah!");

    }

​

    private string m_name;

}

​

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("===PropertyDescriptor.SetValue====");

        var t = new Test();

        try

        {

            PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(t);

            var desc = properties.Find("Name", false);

            desc.SetValue(t, "Fail");

        }

        catch (Exception e)

        {

            Console.WriteLine(e.ToString());

        }

        Console.WriteLine("\n\n\n===Direct setter====");

        try

        {

            t.Name = "Fail";

        }

        catch (Exception e)

        {

            Console.WriteLine(e.ToString());

        }

    }

}