问横切关注点日志

EN

interface IComponent
{
    int Foo(int input);
}

class Component : IComponent
{
    public int Foo(int input)
    {
        return input * 2;
    }
}

class LoggingComponent: IComponent
{
    private readonly IComponent target;

    public LoggingComponent(IComponent target)
    {
        this.target = target;
    }

    public int Foo(int input)
    {
        // ToDo: Add logging before method call

        int returnValue = this.target.Foo(input);

        // ToDo: Add logging after method call

        return returnValue;
    }
}