CollectionAssert.Contains() as a replacement for NUnit's Assert.Contains()

I'm replacing NUnit with TestManager in my Visual Studio project. NUnit has the following Asserts:

• Assert.Contains(string, collection)
• Assert.That(collection, Has.No.Member(string))

I'm using the following for TestManager:

• CollectionAssert.Contains(collection, string)
• CollectionAssert.DoesNotContain(collection, string)

I'm looking for a way to replace

Assert.IsEmpty(collection) and Assert.IsNotEmpty(collection)

I could use CollectionAssert.DoesNotContain(collection, new List<string>()) But would rather have something more solid reflecting on collection.