我的应用程序运行良好，我已经在这个项目上工作了 6 周，没有任何问题。
突然，我得到了这个错误：
Could not create an instance of start up object [my file]. This workbook in assembly. Version 1.0.0.0 Culture=neutral, PublicKey Token=Null
************** Exception Text **************
Microsoft.VisualStudio.Tools.Applications.Runtime.CannotCreateStartupObjectException: Could not create an instance of startup object Compensation_Workbook.ThisWorkbook in assembly Compensation Workbook, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Compensation_Workbook.frmNavigation..ctor() in F:\Test Environment\Compensation Workbook\Compensation Workbook\frmNavigation.vb:line 21
at Compensation_Workbook.ThisWorkbook..ctor(Factory factory, IServiceProvider serviceProvider) in F:\Test Environment\Compensation Workbook\Compensation Workbook\ThisWorkbook.vb:line 8
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.VisualStudio.Tools.Office.Runtime.DomainCreator.ExecuteCustomization.CreateEntryPoint(String entryPointTypeName)
--- End of inner exception stack trace ---
at Microsoft.VisualStudio.Tools.Office.Runtime.DomainCreator.ExecuteCustomization.CreateEntryPoint(String entryPointTypeName)
at Microsoft.VisualStudio.Tools.Office.Runtime.DomainCreator.ExecuteCustomization.Microsoft.VisualStudio.Tools.Office.Runtime.Interop.IExecuteCustomization2.LoadEntryPoints(IntPtr serviceProvider)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.34003 built by: FX45W81RTMGDR
CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
Microsoft.VisualStudio.Tools.Office.Runtime
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualStudio.Tools.Office.Runtime/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.Tools.Office.Runtime.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.34003 built by: FX45W81RTMGDR
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Security
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Security/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Security.dll
----------------------------------------
Microsoft.VisualStudio.Tools.Applications.Hosting
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualStudio.Tools.Applications.Hosting/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.Tools.Applications.Hosting.dll
----------------------------------------
Microsoft.VisualStudio.Tools.Applications.Runtime
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualStudio.Tools.Applications.Runtime/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.Tools.Applications.Runtime.dll
----------------------------------------
System.Deployment
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Deployment/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Deployment.dll
----------------------------------------
Microsoft.VisualStudio.Tools.Applications.ServerDocument
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualStudio.Tools.Applications.ServerDocument/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.Tools.Applications.ServerDocument.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Xml.Linq
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml.Linq/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.Linq.dll
----------------------------------------
Microsoft.Office.Tools
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Office.Tools/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.Office.Tools.dll
----------------------------------------
Microsoft.Office.Tools.Excel.Implementation
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Office.Tools.Excel.Implementation/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.Office.Tools.Excel.Implementation.dll
----------------------------------------
Microsoft.Office.Tools.Common.Implementation
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Office.Tools.Common.Implementation/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.Office.Tools.Common.Implementation.dll
----------------------------------------
Microsoft.Office.Tools.Excel
Assembly Version: 10.0.0.0
Win32 Version: 10.0.40305.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Office.Tools.Excel/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.Office.Tools.Excel.dll
----------------------------------------
Compensation Workbook
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///F:/Test%20Environment/Compensation%20Workbook/Compensation%20Workbook/bin/Debug/Compensation%20Workbook.DLL
----------------------------------------
Microsoft.Office.Tools.Excel.v4.0.Utilities
Assembly Version: 10.0.0.0
Win32 Version: 10.0.30319.1
CodeBase: file:///F:/Test%20Environment/Compensation%20Workbook/Compensation%20Workbook/bin/Debug/Microsoft.Office.Tools.Excel.v4.0.Utilities.DLL
----------------------------------------
我在网上搜索了类似的问题，但没有发现任何适用于我的问题。有 3 个案例，2 个刚刚更新到新版本的 VS，1 个缺少资源。就我而言，我没有更新 VS，我的所有资源都在那里。
我的解决方案运行良好，我刚刚按下调试，运行良好。我写了几行代码和调试，看看它是如何工作的，那是我得到错误的时候。
是否有人熟悉此错误或其根本原因？