C#'s equivalent of Java's wildcard

Question

If it exists, what is the C# equivalent of the following Java code:

new HashMap, Integer>();

I currently

Answer 1

I believe you want to constrain type parameters to generic types - the where keyword is used for that:

class MyDict : Dictionary where TValue : SomeBaseClass
{
    ...
}

Is this what you're asking for or am I misunderstanding your question?

Edit: you cannot do exactly what you ask for in C# - you can't define an local instance of a generic type with a type constraint. You can, however, pre-declare your constrained Dictionary type (like my example) and then create an instance of that type like so:

// SomeClass will have to inherit from SomeBaseClass
MyDict instance = new MyDict ();

I think this is close to what you're looking for. Post a comment if I misunderstand it - I don't know Java this deep.