Question

I wrote a program that allow two classes to ‘fight’. For whatever reason C# always wins. What’s wrong with VB.NET ?

   static void Main(string[] args)     {         Player a = new A();         Player b = new B();          if (a.Power > b.Power)             Console.WriteLine('C# won');         else if (a.Power < b.Power)             Console.WriteLine('VB won');         else             Console.WriteLine('Tie');     } 

Here are the players: Player A in C#:

public class A : Player {     private int desiredPower = 100;      public override int GetPower     {         get { return desiredPower; }     } } 

Player B in VB.NET:

Public Class B    Inherits Player     Dim desiredPower As Integer = 100     Public Overrides ReadOnly Property GetPower() As Integer        Get           Return desiredPower        End Get    End Property  End Class 

And here is a base class.

public abstract class Player {     public int Power { get; private set; }      public abstract int GetPower { get; }      protected Player()     {         Power = GetPower;     } } 

Answer 1

The issue here is that VB is calling the base constructor before setting its field value. So the base Player class stores zero.

.method public specialname rtspecialname          instance void  .ctor() cil managed {   // Code size       15 (0xf)   .maxstack  8   IL_0000:  ldarg.0   IL_0001:  call       instance void [base]Player::.ctor()   IL_0006:  ldarg.0   IL_0007:  ldc.i4.s   100   IL_0009:  stfld      int32 B::desiredPower   IL_000e:  ret } // end of method B::.ctor