Difference between IsGenericType and IsGenericTypeDefinition

What is the difference between Type.IsGenericInfo and Type.IsGenericTypeDefinition ? Interestingly enough, MSDN's link for IsGenericTypeDefinition is broken.

After playing a bit with trying to retrieve all the DbSets defined in a given DbContext, I was lead to the following, which behavior I am trying to understand: filtering properties via IsGenericType returns the desired results, while with IsGenericTypeDefinition not (does not return any).

It's interesting that from this post I have the impression that the author did get his DbSets using IsGenericTypeDefinition, while I did not.

Follows a sample that illustrates the discussion:

private static void Main(string[] args)
{
    A a = new A();
    int propertyCount = a.GetType().GetProperties().Where(p => p.PropertyType.IsGenericType).Count();
    int propertyCount2 = a.GetType().GetProperties().Where(p => p.PropertyType.IsGenericTypeDefinition).Count();

    Console.WriteLine("count1: {0}  count2: {1}", propertyCount, propertyCount2);
}

// Output: count1: 1  count2: 0

public class A
{
    public string aaa { get; set; }
    public List<int> myList { get; set; }
}