Absolutely not — Secrets is a completely valid class name in C#. C# only restricts using reserved keywords as identifiers, and Secrets isn't one of them. The issue you're seeing has nothing to do with the language itself, but rather a quirk in Visual Studio's IntelliSense (the code completion/error-checking system).

Let's break down what's happening and how to fix it:

• Your code is actually correct: The fact that your project compiles without errors proves the compiler can find the Secrets class just fine. The red underline is a false positive from IntelliSense, which sometimes gets out of sync with your project's actual state.
• Why renaming fixes it: When you rename the class to Sekrets or use Visual Studio's global rename tool, you're forcing IntelliSense to refresh its cache and re-scan your project files. This syncs it back up with the compiler's view.

Fixes to resolve the IntelliSense false positive: #

• Clean and rebuild your solution: Go to Build > Clean Solution, then Build > Rebuild Solution. This clears old build artifacts and forces VS to re-analyze all files.
• Restart Visual Studio: Sometimes IntelliSense gets stuck in a bad state, and a simple restart resets it.
• Delete bin/obj folders: Manually delete the bin and obj directories in your project folder (these hold temporary build files), then recompile.
• Force a cache refresh: You can also try right-clicking your project in the Solution Explorer and selecting Refresh, or using the Edit > IntelliSense > Refresh Local Cache command (if available in your VS version).

The bottom line: Secrets is a perfectly valid class name for C#. The red underline is just Visual Studio's IntelliSense acting up, not a problem with your code.

内容的提问来源于stack exchange，提问作者Tim