Getting declared base interfaces only

[daningalla]

Given I have a class:

class MyDictionary : IDictionary<string, object> {}

calling any of the properties or methods that discover base types such as type.DirectBaseTypes or type.GetAllInterfaces(), etc., returns not only the interfaces (interface in this case) that are declared in code, but these methods automatically flatten the hierarchy. So, in the above example I get: IDictionary<K,V>, IEnumerable<KeyValuePair<K,V>>, ICollection<KeyValuePair<K,V>> and IEnumerable.

How do you suggest discovering just the "declared" interface implementation and not the implicit hierarchy?

Thank you.

[dgrunwald]

The C# compiler already flattens the hierarchy for interfaces; there is no difference in IL between
class MyDictionary : IDictionary<string, object> {}
and
class MyDictionary : IDictionary<string, object>, IEnumerable<KeyValuePair<K,V>> {}

The IL is always:

.class private auto ansi beforefieldinit ParallelForEachTest.MyDictionary
	extends [System.Runtime]System.Object
	implements class [System.Runtime]System.Collections.Generic.IDictionary`2<string, object>,
	           class [System.Runtime]System.Collections.Generic.ICollection`1<valuetype [System.Runtime]System.Collections.Generic.KeyValuePair`2<string, object>>,
	           class [System.Runtime]System.Collections.Generic.IEnumerable`1<valuetype [System.Runtime]System.Collections.Generic.KeyValuePair`2<string, object>>,
	           [System.Runtime]System.Collections.IEnumerable

DirectBaseTypes gives the base type and interfaces directly declared in the IL code for that class; it doesn't flatten anything more than it is already in the IL code.