Problems with abstract keyword

[thomasdiemar]

Code

   public abstract class ATest
    {
        public abstract int MyMethod();
    }

    public class MyTest : ATest
    {
        public override int MyMethod()
        {
            return -1;
        }
    }

Result

    public abstract class b { public abstract int a();}
    public class c : b { public override int MyMethod() { return -1; } }

Attempt to workaround Code:

    public abstract class ATest
    {
        public virtual int MyMethod() { return -1; }
    }

    public class MyTest : ATest
    {
        public override int MyMethod()
        {
            return -1;
        }
    }

Result

public abstract class b{public virtual int a(){return-1;}}public class c:b{
public override int MyMethod(){return-1;}}

Another attempt to workaround

     public class ATest
    {
        public virtual int MyMethod() { return -1; }
    }

    public class MyTest : ATest
    {
        public override int MyMethod()
        {
            return -1;
        }
    }

Result

public class b{public virtual int a(){return-1;}}public class c:b{public
override int MyMethod(){return-1;}}

Yet another attempt

    public class ATest
    {
        public virtual int MyMethod() { return -1; }
    }

    public class MyTest : ATest
    {
        public new int MyMethod()
        {
            return -1;
        }
    }

Result:

public class b{public virtual int a(){return-1;}}public class c:b{public new int
a(){return-1;}}

Now were getting somewhere.

Because you cant use new keyword when overriding a abstract method, it has to be virtual.

Workaround is:

    public abstract class ATest
    {
        public virtual int MyMethod() { return -1; }
    }

    public class MyTest : ATest
    {
        public new int MyMethod()
        {
            return base.MyMethod();
        }
    }

Result

    public abstract class b { public virtual int a() { return -1; } }
    public class c : b
    {
        public new int a() { return base.a(); }
    }

Which pass this test

    [TestClass]
    public class UnitTest
    {
        [TestMethod]
        public void TestMethod()
        {
            b t = new c();
            Assert.AreEqual(-1, t.a());
        }
    }