C# - How to access a generic typed property

My challenge for today was to get the value of generic typed properties from a generic type. Here is the code that worked.

pendingRequest is a generic-typed instance of RequestResponseAsyncResult where the Request and Response properties are generic.

First we have to get the generic type definition:

Type requestType = pendingRequest.GetType().GetGenericTypeDefinition();

Next we get the generic type arguments:

Type[] typeArgs = requestType.GetGenericArguments();

Then we create a generic base type from our generic type:

Type genericType = typeof(RequestResponseAsyncResult<,>);

The next step is to created a generic type according to the type arguments:

Type constructed = genericType.MakeGenericType(typeArgs);

Now we are able to get the property information:

PropertyInfo pireq = pendingRequest.GetType().GetProperty("Request");
PropertyInfo piresp = pendingRequest.GetType().GetProperty("Response");

Finally we can get our properties using reflection:

object request = pireq.GetValue(pendingRequest, null);
object response = piresp.GetValue(pendingRequest, null);