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Created attachment 7380 [details]
When toggling Autolayout on for a storyboard, the constraint toolbar does not appear.
### Steps to Reproduce:
1. Create an iOS storyboard project.
2. Open the storyboard file in the designer.
3. Click in an open area of the design surface.
(If Autolayout is already disabled, skip ahead to step 7)
4. Go to the properties and disable Autolayout if its already enabled.
5. Save the storyboard file and close it.
6. Reopen the storyboard file.
7. Enable Autolayout by checking the box.
### Actual Results:
The constraint toolbar does not appear.
### Expected Results:
The constraint toolbar should appear when you enable Autolayout.
Here is an example of how XS looks: http://screencast.com/t/Pj0hLVI0
### Build Date & Platform:
### Additional Information:
A workaround seems to be to save the storyboard file, close it and re-open it and the constraint toolbar will be visible.
If you run into Visual Studio crashing when you attempt step 4, try running the attached sample project instead which already has auto layout disabled for the iPhone storyboard. This might be because of #20620 which was fixed in XVS 3.3
I have checked this issue with the steps provided in bug description and observed the same behavior mentioned in bug description.
Screencast : http://www.screencast.com/t/bGWEivk8
Note : With XS on mac, It is working fine and getting behavior as expected.
Environment Info :
Xamarin.iOS Build Host 220.127.116.11
Changing component to designer.
Doesn't seem to happen in newer builds. It must've been fixed some time in the last year+