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Set a data breakpoint -- Set data breakpoints (native C++ only)
Break when watched variable has changed
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Oliver Marshall
1
Reputation point
Hi all
Is there a way to set the VS debugger to break when a watched variable has changed?
I use VS with Unity 2020 and I've spent ages trying to find where one of my variables is changing. I've tried popping debug.log code in at various places but I wonder whether there's a way to set a watch on the variable and just run the code and have VS break when the variable changes value.
Is something like that possible?
Olly
Developer technologies Visual Studio Debugging
Developer technologies C#
11,570 questions
3 answers
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RLWA32 49,536 Reputation points2021-10-16T15:43:37.2+00:00 -
RLWA32 49,536 Reputation points
2021-10-16T17:24:27.44+00:00 Apparently the tag for the question was changed. Initially it was tagged for C++ not C#.
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Oliver Marshall 1 Reputation point
2021-10-16T15:55:43.297+00:00 Thanks. I didn't know about data breakpoints.
The link is for C++ whereas I'm using C#.
It does appear that c# support for Data Breakpoints was added to VS 2019 v16, however I'm running 16.11.5 and it remains greyed out for me.
Olly
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Viorel 122.6K Reputation points2021-10-16T16:14:12.663+00:00 It seems that such breakpoints are available for .NET Core-based programs and work for properties only (not for local variables etc.).
Maybe you can replace your variable with a property that has a "setter" and "getter", without other major changes. Then you can put a simple breakpoint inside the "setter".
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Anna Xiu-MSFT 31,056 Reputation points Microsoft External Staff2021-10-18T09:54:11.217+00:00 Hi @Oliver Marshall ,
Welcome to Microsoft Q&A!
As the document states: Troubleshooting data breakpoint errors,
The support for managed data breakpoints began in .NET Core 3.0. It is currently not supported in .NET Framework, versions of .NET Core under 3.0, or versions of .NET under 5.0.3.For any suggestions about this feature, please report it via Help > Send Feedback > Report a Problem in the IDE or in the Developer Community.
Sincerely,
Anna
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