PropertySetterTest

This project should demonstrate a bug discovered in Visual Studio 2017 that occurs when you examine a variable in the Locals tab.

Environment

• Windows 10 Pro
• Visual Studio 2017 v15.7.4
• No extensions

Repro Instructions

Please use the following instructions to reproduce the bug:

1. Insert a breakpoint at PropertySetterTest.sln > Test.cs > Line 22 (The line that reads _string = value;)
2. Once the breakpoint is in place: Run the app and let it hit the breakpoint
3. Once the breakpoint is hit: Hit F10 once to step to the next line
4. IMPORTANT (bug is triggered by this action): Examine value and this > _string in the Locals tab (_string != value for some reason...)
5. Hit Continue to finish executing the app
6. Notice that Program.RunTest() > Child.Test() returns false; indicating a test failure
7. Disable all breakpoints
8. Run the app again
9. Notice that Program.RunTest() > Child.Test() returns true; indicating a test success

Expected Behavior

I expected _string to be set to value in the String property's setter, even after examining _string's value via the Locals tab in Visual Studio.

Actual Behavior

Examining the _string variable prevents it from being set to value- which doesn't happen if you do not examine the value in the Locals tab during execution.

Additional Information

If you remove the _storage variable from the Test class- the bug does not occur.