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Home/ Questions/Q 4334494
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Editorial Team
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Editorial Team
Asked: May 21, 20262026-05-21T10:32:14+00:00 2026-05-21T10:32:14+00:00

public interface ITest { int ChildCount { get; set; } } public class Test

  • 0
public interface ITest
{
    int ChildCount { get; set; }
}

public class Test
{
}

public class OrderPool : ITest, Test
{
    public int ChildCount
    {
        get;
        set;
    }
}

The error says Base class ‘Test’ must come before any interfaces.
Why is it necessary to extend the class first and then implement the inteface?

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  1. Editorial Team
    Editorial Team
    2026-05-21T10:32:15+00:00Added an answer on May 21, 2026 at 10:32 am

    Because the specification says so in section §17.1.2.

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