How can you prevent compile errors in your C# applications when using types that aren't compliant with the CLS?

162.

By adding the CLSCompliantAttribute(true) to either an assembly or a class

By adding the AttributeUsageAttribute(true) to either an assembly or a class

By adding the ComClassAttribute(true) to either an assembly or a class

By adding the DebugInfoInPDBAttribute(true) to either an assembly or a class

Indicates whether a program element is compliant with the Common Language Specification (CLS).

The following example applies a CLSCompliantAttribute to the entire assembly.
using System;
[assembly: CLSCompliant(true)]