问在进行单元测试后无法加载文件或程序集

EN

using Microsoft.VisualStudio.TestTools.UnitTesting;
using SolidWorks.Interop.sldworks;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using Dispensing.Classes.Utilities;
using SolidWorks.Interop.swconst;

namespace TestEntityDB
{
    /// <summary>
    ///     Summary description for SolidworksFeatureTreeTests
    /// </summary>
    [TestClass]
    public class SolidworksFeatureTreeTests
    {
        public ISldWorks _swApp;

        [TestInitialize]
        public void StartTestEnvironment()
        {
            _swApp = new SldWorks();
            var errors = 0;
            var warnings = 0;
            _swApp.OpenDoc6(@"C:\Users\erics\Desktop\Part1.SLDPRT", 1, 1, "Default", ref errors, ref warnings);
        }

        [TestCleanup]
        public void CleanUpTestEnvironment()
        {
            _swApp.CloseAllDocuments(true);
            _swApp.ExitApp();
        }


        [TestMethod]
        public void TestMethod1()
        {
            var tree = new SwFeatureTree();
            tree.FeatureTreeConfiguration.ExclusionByNamesList.Add("(-) Sketch1");
            Assert.AreEqual(1, tree.FeatureTreeConfiguration.ExclusionByNamesList.Count);
            //tree.BuildTree(_swApp.ActiveDoc as IModelDoc2);
            //Assert.AreEqual(25, tree.TreeItems.Count);
        }
    }
}