Не удалось создать сборку в MS SQL SERVER

Я пытаюсь реализовать funcationality маршрутизации в MS SQL Server 2012 с использованием профайлового учебника, я создал класс С# и успешно создаю DLL файл.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SqlServer.Server;
using Microsoft.SqlServer.Types;

namespace ProSQLSpatial.Ch14
{
public partial class UserDefinedFunctions
{
    [Microsoft.SqlServer.Server.SqlFunction]
    public static SqlGeometry GeometryTSP(SqlGeometry PlacesToVisit)
    {
        // Convert the supplied MultiPoint instance into a List<> of SqlGeometry points
        List<SqlGeometry> RemainingCities = new List<SqlGeometry>();
        // Loop and add each point to the list
        for (int i = 1; i <= PlacesToVisit.STNumGeometries(); i++)
        {
            RemainingCities.Add(PlacesToVisit.STGeometryN(i));
        }
        // Start the tour from the first city
        SqlGeometry CurrentCity = RemainingCities[0];

        // Begin the geometry
        SqlGeometryBuilder Builder = new SqlGeometryBuilder();
        Builder.SetSrid((int)PlacesToVisit.STSrid);
        Builder.BeginGeometry(OpenGisGeometryType.LineString);
        // Begin the LineString with the first point
        Builder.BeginFigure((double)CurrentCity.STX, (double)CurrentCity.STY);
        // We don't need to visit this city again
        RemainingCities.Remove(CurrentCity);

        // While there are still unvisited cities
        while (RemainingCities.Count > 0)
        {
            RemainingCities.Sort(delegate(SqlGeometry p1, SqlGeometry p2)
            { return p1.STDistance(CurrentCity).CompareTo(p2.STDistance(CurrentCity)); });

            // Move to the closest destination
            CurrentCity = RemainingCities[0];

            // Add this city to the tour route
            Builder.AddLine((double)CurrentCity.STX, (double)CurrentCity.STY);

            // Update the list of remaining cities
            RemainingCities.Remove(CurrentCity);
        }

        // End the geometry
        Builder.EndFigure();
        Builder.EndGeometry();

        // Return the constructed geometry
        return Builder.ConstructedGeometry;
    }
};
}

Я также включил CLR, и когда я пытаюсь создать сборку, используя созданную выше DLL:

CREATE ASSEMBLY GeometryTSP 
FROM 'D:\Routing\my example\GeometryTSP\GeometryTSP\bin\Debug\GeometryTSP.dll' 
WITH PERMISSION_SET = EXTERNAL_ACCESS; 
GO 

Я получаю ошибку "Ошибка создания AppDomain" следующим образом:

Msg 6517, Level 16, State 1, Line 2
Failed to create AppDomain "master.dbo[ddl].12". 
Exception has been thrown by the target of an invocation.

В чем причина?