How do I put new List {1} in an NUNIT TestCase?

Question

I have the method:

public static int Add(List numbers)
    {
        if (numbers == null || numbers.Count == 0)
            return 0;

        if          


        

Answer 1

Improve code for @Yurii Hohan answer:

private  static readonly object[] _Data =
        {
            new object[] {new List {0}, "test"},
            new object[] {new List {0, 5}, "test this"},
        };

[Test, TestCaseSource(nameof(_Data))]

Hope this help.