Compiler Error CS1689
Attribute 'Attribute Name' is only valid on methods or attribute classes
This error only occurs with the ConditionalAttribute attribute. As the message states, this attribute can only be used on methods or attribute classes. For example, trying to apply this attribute to a class will generate this error.
The following sample generates CS1689.
// CS1689.cs
// compile with: /target:library
[System.Diagnostics.Conditional("A")] // CS1689
class MyClass {}
Collaborate with us on GitHub
The source for this content can be found on GitHub, where you can also create and review issues and pull requests. For more information, see our contributor guide.
.NET feedback
.NET is an open source project. Select a link to provide feedback: