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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

Identifiers should not have incorrect suffix







Breaking Change


An identifier has an incorrect suffix.

By convention, only the names of types that extend certain base types or that implement certain interfaces, or types derived from these types, should end with specific reserved suffixes. Other type names should not use these reserved suffixes.

The following table lists the reserved suffixes and the base types and interfaces they are associated with.

In addition, the following suffixes should not be used:

  • Delegate

  • Enum

  • Impl - use 'Core' instead

  • Ex or similar suffix to distinguish it from an earlier version of the same type

Naming conventions provide a common look for libraries that target the common language runtime. This reduces the learning curve required for new software libraries, and increases customer confidence that the library was developed by someone with expertise in developing managed code.

Remove the suffix from the type name.

Do not suppress a warning from this rule.

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