Question

Ive a class that implement the IMarcas interface:

  public class BaseQuestao : IMarcas
    {
        public string TxtMarca
        {
            get;
            set;
        }
    }

Where TxtMarca property is an assignture from that interface.

Problem is that when i try to execute follow code is says that BasesQuestao is NOT IMarcas:

BaseQuestao bs = new BaseQuestao();
IMarcas brand =  bs as IMarcas;
if (brand != null)
{
    bs.TxtMarca = "voila";
}

Any ideias?

Answer 1

As others have said, you’re using the wrong variable (bs instead of brand) – but it would have worked either way.

Here’s an example with the code corrected:

using System;

public interface IMarcas
{
    string TxtMarca { get; set; }
}

public class BaseQuestao : IMarcas
{
    public string TxtMarca
    {
        get;
        set;
    }
}

class Test
{
    static void Main()
    {
        BaseQuestao bs = new BaseQuestao();
        IMarcas brand =  bs as IMarcas;
        if (brand != null)
        {
            brand.TxtMarca = "voila";
            Console.WriteLine("Done");
        }
    }
}

and even with the original code:

if (bs != null)
{
    bs.TxtMarca = "voila";
    Console.WriteLine("Done");
}

… it’s still fine.