How can I test a method with a Task return type?

I am trying to test a method whose signature is of the form

public async Task<List<int>> MethodToBeTested()

I have written a unit test as follows

[TestMethod] 
public async Task MethodToBeTestedSuccess()
{
Task<List<int>> results = await MethodToBeTested()
......
}

If the method's return type had been a generic List of integers I would have performed the following steps to test the output

List<int> results = MethodToBeTested();
int numberOfResults = results.Count;
Assert.AreEqual(numberOfResults,2300);

My question therefore is: how can I test the async method, whose return type is wrapped in a task, and validate that 2300 results have been returned?

If I try the strategy I attempted on the generic list of integers I get the error: cannot convert the method group Count to non-delegate type int.

Thanks in advance for any help.