follow step below:
1. Make sure .NET Framework/.NET Symbol loading is enabled
In VS: Tools → Options → Debugging → Symbols.
Ensure Microsoft Symbol Servers is checked.
Clean out %TEMP%\SymbolCache (or wherever you cache symbols) and let VS reload them.
If symbols for your own project aren’t loading, check Debug → Windows → Modules to verify.
2. Check Managed Debugging settings
Go to Tools → Options → Debugging → General.
Try toggling these options:
Use Managed Compatibility Mode (this was off by default in 2022, but some older projects need it).
Enable property evaluation and other implicit function calls (must be ON to expand objects automatically).
Enable Just My Code (sometimes interferes, try turning OFF).
Use the new Debugger for .NET Core and .NET 5+ (turn OFF if your project is classic .NET Framework).
3. Check that you’re not in Release/optimized code
If you’re debugging a Release build with optimization enabled, Visual Studio might strip locals or refuse to expand them.
Build in Debug and ensure Project Properties → Build → Optimize code is unchecked.
4. Natvis / DebuggerDisplay attributes
Visual Studio uses .natvis files and [DebuggerDisplay] / [DebuggerTypeProxy] attributes to show custom object content. If those are missing or corrupted:
In Debug → Windows → Watch, right-click → “Add Watch” and try evaluating individual properties (e.g. myObj.PropertyName) — if that works, then it’s a visualization issue.
You can add your own DebuggerDisplay attribute on types if necessary.