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C# vs Java generics
Java use Type erasure while C# keep type information at runtime, what are the practical difference in the behaviors of the language from this design?
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The way to implement generics, the Java compiler applies type erasure to: Replace all type parameters in generic types with their bounds or Object if the type parameters are unbounded. The produced bytecode, therefore, contains only ordinary classes, interfaces, and methods.
C# does not have type erasure. C# has actual generic types deeply baked into the runtime.
Type Erasure is achieved in C++ by encapsulating a concrete implementation in a generic wrapper and providing virtual accessor methods to the concrete implementation via a generic interface.
There are a lot of issues with type erasure. It brings back bad memories. I haven't used Java since 1.6, so this may be out of date, but some things I remember:
class c implements IComparable<MyClass>, IComparable<MyOtherClass> is impossible.
List<T1>, List<T2>, and so on. For example, Java -- How to deal with type erasure in constructors?
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