VB.NET class inherits a base class and implements an interface issue (works in C#)
- by 300 baud
I am trying to create a class in VB.NET which inherits a base abstract class and also implements an interface. The interface declares a string property called Description. The base class contains a string property called Description. The main class inherits the base class and implements the interface. The existence of the Description property in the base class fulfills the interface requirements. This works fine in C# but causes issues in VB.NET.
First, here is an example of the C# code which works:
public interface IFoo
{
string Description { get; set; }
}
public abstract class FooBase
{
public string Description { get; set; }
}
public class MyFoo : FooBase, IFoo
{
}
Now here is the VB.NET version which gives a compiler error:
Public Interface IFoo
Property Description() As String
End Interface
Public MustInherit Class FooBase
Private _Description As String
Public Property Description() As String
Get
Return _Description
End Get
Set(ByVal value As String)
_Description = value
End Set
End Property
End Class
Public Class MyFoo
Inherits FooBase
Implements IFoo
End Class
If I make the base class (FooBase) implement the interface and add the Implements IFoo.Description to the property all is good, but I do not want the base class to implement the interface.
The compiler error is:
Class 'MyFoo' must implement 'Property Description() As String' for interface 'IFoo'. Implementing property must have matching 'ReadOnly' or 'WriteOnly' specifiers.
Can VB.NET not handle this, or do I need to change my syntax somewhere to get this to work?
