Visual Studio诊断会话异常及VS2017 Release模式执行时间窗口消失求助

Hey there, let's work through these two frustrating problems you're hitting in VS2017—since everything was working fine yesterday, we can focus on recent changes or misconfigurations that might have thrown things off.

Issue 1: Diagnostic Sessions Won't Run Properly #

Here are some quick fixes to try, starting with the simplest:

• Restart VS and your machine: Sometimes cached processes or temporary glitches block diagnostic tools from launching. A fresh start often clears this up.
• Reset Visual Studio settings: Go to Tools > Import and Export Settings > Reset all settings. You can back up your current settings first to avoid losing customizations, then reset to default. This fixes a lot of odd behavior caused by misconfigured settings.
• Repair your VS installation: Open Control Panel > Programs and Features, find Visual Studio 2017, click "Change", then select "Repair". This will fix any corrupted or missing components that might be breaking diagnostic sessions.
• Verify diagnostic tools are enabled: Check Tools > Options > Debugging > General and make sure the box for "Enable Diagnostic Tools while debugging" is checked. It might have been accidentally toggled off.

Issue 2: Execution Time Window Only Shows in Debug Mode (Missing in Release) #

Since this worked yesterday, the culprit is likely a setting change in your Release configuration. Try these steps:

• Check Release mode diagnostic settings: Head to Debug > Options and Settings > Debugging > General—make sure the same "Enable Diagnostic Tools while debugging" option is checked for the Release configuration (settings can be per-build mode, so Debug might be enabled but Release isn't).
• Temporarily disable code optimization: Release mode defaults to enabling code optimization, which can interfere with the diagnostic tool's ability to track execution time. Right-click your project > Properties > Build > General, set "Optimize code" to False, then run a Release debug session. If the time window comes back, you can either keep optimization off (if performance isn't critical) or add manual timing to your code using the Stopwatch class for more reliable results in optimized builds.
• Restore the diagnostic tools window: Sometimes the window gets hidden accidentally. While running a Release debug session, go to Debug > Windows > Show Diagnostic Tools to force it to appear. You can also right-click the debug toolbar and ensure "Diagnostic Tools" is checked to keep it visible.
• Check for recent changes: Think about any plugins you installed, settings you modified, or VS updates applied since yesterday. Try disabling new plugins or reverting setting changes to see if that brings the time window back.

Let me know if any of these steps resolve your issues, or if you need more details on any of the fixes!

内容的提问来源于stack exchange，提问作者Joe