dotnet/Documentation/compatibility/null-coalescer-values-are-n...

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## Null coalescer values are not visible in debugger until one step later
### Scope
Edge
### Version Introduced
4.5
### Version Reverted
4.6
### Source Analyzer Status
Not planned
### Change Description
A bug in the .NET Framework 4.5 causes values set via a null coalescing operation to not be visible in the debugger immediately after the assignment operation is executed when running on the 64-bit version of the Framework.
- [ ] Quirked
- [ ] Build-time break
### Recommended Action
Stepping one additional time in the debugger will cause the local/field's value to be correctly updated. Also, this issue has been fixed in the .NET Framework 4.6; upgrading to that version of the Framework should solve the issue.
### Affected APIs
* Not detectable via API analysis
### Category
Debugger
[More information](http://stackoverflow.com/questions/19352130/why-doesnt-the-null-coalescing-operator-work-in-this-situation)
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