CA1014 Mark 'some.dll' with CLSCompliant(true) error message with StyleCop of VS2010

Question

When I run StyleCop, I got this error message saying that I need to Mark the dll with CLSCompliant(true).

What is this? How can I set the Mark the dll with CLSCompliant(true)?

Error   4   CA1014 : Microsoft.Design : 
Mark 'SOMETHING.dll' with CLSCompliant(true) because it exposes externally 
                     visible types. ModelsimCommunicator

Comnenus

Answer 1

To mark the DLL as CLS compliant do the following in the root namespace.

[assembly: CLSCompliant(true)]

Note: This error is coming from FxCop not StyleCop. FxCop errors are prefixed with CA while StyleCop uses the SA prefix

Just

Are you sure it's in the root namespace, because Microsoft says have it before the namespace. (msdn.microsoft.com/query/…) – Wheedle

try adding this to AssemblyInfo.cs – Osborne

The CA rules are also part of the Code Analysis run when you enable CA for a project. – Maritamaritain

Credit to @Just and hnafar for the correct answer. For anyone who might encounter this in a WPF application using .NET 6, I just added [assembly: CLSCompliant(true)] to the AssemblyInfo.cs file that was already part of the project template. – Simson

I would like to know more about why this occurs. I have a solution of around 70 projects and I get this warning on two of them. The same two projects also raise warning CA2210 "Sign 'my.dll' with a strong name key" which may or may not be coincidental. Obviously I can suppress these warnings, but it would be useful to work out why just these two projects are raising these warnings. Anyone have a clue? (VS2022) – Calisa

Answer 2

To disable:

[assembly: CLSCompliant(false)]

Kuopio