C# – Calling Base Class Constructor

Modify your constructor to the following so that it calls the base class constructor properly:

public class MyExceptionClass : Exception
{
    public MyExceptionClass(string message, string extrainfo) : base(message)
    {
        //other stuff here
    }
}

Note that a constructor is not something that you can call anytime within a method. That's the reason you're getting errors in your call in the constructor body.

Can't you simplify your approach by using an optional parameter?

    public class Person
    {
        public int Id { get; protected set; }
        public string Name { get; protected set; }
        public Person(string name = "")
        {
            Id = 8;
            Name = name;
        }
    }

    public class Engineer : Person
    {
        public int Problems { get; private set; }
        public Engineer(string name = "")
            : base(name)
        {
            Problems = 88;
        }
    }

    [TestFixture]
    public class EngineerFixture
    {
        [Test]
        public void Ctor_SetsProperties_AsSpecified()
        {
            var e = new Engineer("bogus");
            Assert.AreEqual("bogus", e.Name);
            Assert.AreEqual(88, e.Problems);
            Assert.AreEqual(8, e.Id);
        }
    }