Points to Note

Setup and Teardown

public class FooTest : IDisposable
{
    private readonly Bar _sut;
    
    // setup
    public FooTest()
    {
        _sut = new Bar();
    }
    
    // teardown
    public void Dispose()
    {
        // Dispose here
    }

    [Fact]
    public void BeInexperiencedWhenNew()
    {            
        Assert.True(_sut.IsOk);
    }
}