Microsoft visual studio 2015 object reference not set to an instance of an object free. RadTreeView generates an error: "object reference not set to an instance of an object" in XAML.

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  Thank you in advance for your cooperation. Environment data dotnet --info output:. The only reliable way to solve the problem is to place a breakpoint to the method and use the debugger aj find out what is happening and what are the values of each variable. Controls, Telerik.  

- Microsoft visual studio 2015 object reference not set to an instance of an object free

 

What I did was to click on repair rather than uninstall. After repairing, I clicked on restart directly. After that, everything is working perfectly. You should try this, may be it can work also for you!!! Restarting Visual Studio did it for me. On the next run, it displayed a "Scanning new and updated MEF components Delete bin and obj folders in all projects of that solution.

Seems like those folders were having old files generated by some older version of visual studio, which are not compatible with new version of visual studio. The solution to the issue when i had this earlier today was that there was an additional set of tags bolted on the end of my Web. Once removed the functionality returned.

When I tried to open a solution it threw some provider not set correctly. Solution: After many hours of research trying out all the solutions previously mentioned by others didn't solve my problem. Every time the error popup was pointing to check the ActivityLog. But I was ignoring it.

After hours of frustration I decided to read the error carefully and looked into ActivitLog. Immutable" and change newVersion from 1. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Teams. Asked 6 years, 8 months ago. Modified 2 years, 7 months ago. Viewed k times. I'm using Visual Studio Improve this question.

TylerH 21k 58 58 gold badges 73 73 silver badges 92 92 bronze badges. Carsten Cors Carsten Cors 2, 2 2 gold badges 13 13 silver badges 21 21 bronze badges. Controls reference back to the project. However, the Object Reference errors are also back. Let me know when someone can connect to review this. These errors are not yet holding up a project I need this resolved within the week. Been very busy so I haven't had a chance to respond. However, the error continues.

If you are unable to reproduce this then I suggest you and I set up a remote session to work through this. This is a migrated thread and some comments may be shown as answers. Eugene Top achievements Rank 1. Eugene asked on 22 Apr , AM.

But when I put RadTreeView in UserControl area then it is underlined with blue wavy line and if I move the mouse cursor to this line the next error message is displayed: "Object reference not set to an instance of an object". I've added references to the following assemblies: Telerik.

Controls, Telerik. Navigation, Telerik. But I have the abovementioned error. What the reason of it. Please help me eliminate this error situation. Add a comment. Submit comment. Jump to bottom. Unknown build error, 'Object reference not set to an instance of an object. Labels Bug Resolved-Fixed. Milestone 1. Copy link. Environment data dotnet --info output:. Expected behavior Project loaded and built Actual behavior Everytime i'm opening any project on my machine i got next warning in omnisharp log: [warn]: OmniSharp.

All reactions. DustinCampbell mentioned this issue Apr 11, DustinCampbell self-assigned this Apr 11, Relaunch Visual Studio Extension. This was caused by the manual installation not installing things fully. Any hint on how to proceed here?

Deinstall and reinstall? Or do a Repair? Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. You signed in with another tab or window. Reload to refresh your session.