When .NET assemblies are compiled, which classes have x__ in their names?

Question

For instance:

• StudentRegistrationService<>c__DisplayClass1
• <>f__AnonymousType56`2
• DocShareClassification<GetErrors>d__2

I am sure that it StudentRegistrationService<>c__DisplayClass1is a closure, and <>f__AnonymousType56`2was generated when an anonymous type was specified, but I have never seen a class d__before. Is there more than just these?

Answer 1

These are classes that are generated by the C # compiler to support at least the following functions.

• Closing / Anonymous Method Expressions
• Anonymous types
• iterators

d__2 one probably helps the iterator class.

Answer 2

This is during compilation of created classes created using anonymous types

Answer 3

IIRC are the classes generated for iterator blocks. However, you must make any assumptions about these names or rely on them - these are implementation details and are subject to change at any time.