An answer on " Implementations of interface through Reflection " shows how to get all implementations of an interface. However, given a generic interface, IInterface<T>, the following doesn't work:
var types = TypesImplementingInterface(typeof(IInterface<>)) Can anyone explain how I can modify that method?
You can use something like this:
public static bool DoesTypeSupportInterface(Type type, Type inter) { if(inter.IsAssignableFrom(type)) return true; if(type.GetInterfaces().Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == inter)) return true; return false; } public static IEnumerable<Type> TypesImplementingInterface(Type desiredType) { return AppDomain .CurrentDomain .GetAssemblies() .SelectMany(assembly => assembly.GetTypes()) .Where(type => DoesTypeSupportInterface(type, desiredType)); } It can throw a TypeLoadException though but that's a problem already present in the original code. For example in LINQPad it doesn't work because some libraries can't be loaded.
GetInterfaces() doesn't return interfaces implemented by a parent class, does it? Do I need to recursively look at parent classes until I hit typeof(System.Object)?GetInterfaces() returns "all the interfaces implemented or inherited by the current Type."It doesn't work because IInterface<object> (using System.Object for T as an example) doesn't inherit from the "open" generic type IInterface<>. A "closed" generic type is a root type, just like IFoo. You can only search for closed generic types, not open ones, meaning you could find everything that inherits from IInterface<int>. IFoo does not have a base class, nor does IInterface<object> or IInterface<string> etc.
