C# 实现依赖注入（简易版）

public interface ILogger { void Log(string message); }
public class ConsoleLogger : ILogger { public void Log(string message) => Console.WriteLine($"日志: {message}"); }
public class DIContainer
{
    private readonly Dictionary<Type, Type> _typeMap = new Dictionary<Type, Type>();
    // 注册类型映射
    public void Register<TInterface, TImplementation>() where TImplementation : TInterface
    {
        _typeMap[typeof(TInterface)] = typeof(TImplementation);
    }
    // 解析对象
    public T Resolve<T>()
    {
        Type interfaceType = typeof(T);
        if (!_typeMap.TryGetValue(interfaceType, out var implType))
        {
            throw new InvalidOperationException("未注册的类型");
        }
        return (T)Activator.CreateInstance(implType);
    }
}
// 调用示例
public static void TestDI()
{
    var container = new DIContainer();
    container.Register<ILogger, ConsoleLogger>();
    ILogger logger = container.Resolve<ILogger>();
    logger.Log("依赖注入测试");
}