[TestMethod]
public void TestMethod1()
{
    int? count = 3;
    Assert.AreEqual(count, new List<string>().Count);
}

[TestMethod]
public void TestMethod1()
{
    int? count = 3;
    Assert.HasCount(count, new List<string>());
}

[TestMethod]
public void TestMethod1()
{
    int? count = 3;
    Assert.IsTrue(count.HasValue); // or Assert.IsNotNull(count)
    Assert.HasCount(count.Value, new List<string>());
}