Cannot find an instance of the Microsoft.VisualStudio.Shell.Interop.IVsToolsOptions service while accesing options page values in vsix project

Question

I am getting the following exception when I try to access the Option page textbox values in vsix project.

{"Cannot find an instance of the Microsoft.VisualStudio.Shell.Interop.IVsToolsOptions service."} Microsoft.Assumes.InternalErrorException

Preferences.cs code which inherits DialogPage

using Microsoft.VisualStudio.Shell;  
using System.ComponentModel;  
using System.Runtime.InteropServices;  
using Microsoft.VisualStudio.Shell.Interop;  
using System;  
  
namespace Code_Forensics  
{  
    [Guid("00000000-0000-0000-0000-000000000000")]  
    [ClassInterface(ClassInterfaceType.AutoDual)]  
    [ComVisible(true)]  
    public class Preferences : DialogPage  
    {  
        private PreferencesControl _control;  
  
        public string ResultStoreFolder { get; set; }  
        public string PollingInterval { get; set; }  
  
        protected override System.Windows.Forms.IWin32Window Window  
        {  
            get  
            {  
                _control = new PreferencesControl();  
                _control._controlpage = this;  
                _control.ResultStoreFolder = ResultStoreFolder;  
                _control.PollingInterval = PollingInterval;  
                return _control;  
            }  
        }  
        protected override void OnApply(DialogPage.PageApplyEventArgs e)  
        {  
            if (e.ApplyBehavior == ApplyKind.Apply)  
            {  
                ResultStoreFolder = _control.ResultStoreFolder;  
                PollingInterval = _control.PollingInterval;  
            }  
            base.OnApply(e);  
        }  
    }  
}  
  

I tried this solution but didnt work
https://developercommunity.visualstudio.com/t/cannot-find-an-instance-of-the-microsoftvisualstud-1/664792

Can anyone help me with this?

Answer 1

Hi @Siddhi Kamat ,

Please run the following command to add the “Microsoft.VisualStudio.Shell.Interop.8.0.dll” assembly and try again:
gacutil -i Microsoft.VisualStudio.Shell.Interop.8.0.dll

Sincerely,
Anna

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