Why must the base class be specified before interfaces when declaring a derived class?

Question

public interface ITest
{
    int ChildCount { get; set; }
}

public class Test
{
}

public class OrderPool : ITest, Test
{
    public int ChildCount
    {
        ge         


        

Answer 1

You can only inherit from one base class but many interfaces. So if there is more than one type listed you know that the first one is a class, the others interfaces. This works regardless of class/interface naming conventions