.Net Core之设计模式练习

开发环境 Windows10+VS2019+.Net Core3.1

参考了：https://www.cnblogs.com/xuzeyu/p/9400815.html

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必须精通的设计模式

抽象工厂模式

单例模式

装饰者模式

观察者模式

适配器模式

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单例模式

/// <summary>
/// 饿汉模式
/// </summary>
public class Singleton
{
    private static Singleton instance = new Singleton();
    private Singleton() { }
    public static Singleton getInstance()
    {
        return instance;
    }
}


/// <summary>
/// 懒汉模式
/// </summary>
public class SingletonLock
{
    private static SingletonLock instance;
    private static readonly object lockObject = new object();
    public static SingletonLock getInstance()
    {
        lock (lockObject)
        {
            if (instance == null)
            {
                instance = new SingletonLock();
            }
        }
        return instance;
    }
}