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Identifiers should not have 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.
An event-handler delegate.
In addition, the following suffixes should not be used:
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.