在C#中实例化泛型类型的实例

public class Box<T>
{
    private T _value;

    public Box(T value)
    {
        _value = value;
    }

    public T GetValue()
    {
        return _value;
    }

    public void SetValue(T value)
    {
        _value = value;
    }
}

// 实例化一个存储整数的 Box
Box<int> intBox = new Box<int>(123);
Console.WriteLine(intBox.GetValue()); // 输出: 123

// 实例化一个存储字符串的 Box
Box<string> stringBox = new Box<string>("Hello, World!");
Console.WriteLine(stringBox.GetValue()); // 输出: Hello, World!

public class GenericFactory<T> where T : new()
{
    public T CreateInstance()
    {
        return new T();
    }
}

// 使用示例
GenericFactory<MyClass> factory = new GenericFactory<MyClass>();
MyClass instance = factory.CreateInstance();

public class ConstrainedBox<T> where T : IComparable, new()
{
    private T _value;

    public ConstrainedBox(T value)
    {
        _value = value;
    }

    public bool IsGreaterThan(T other)
    {
        return _value.CompareTo(other) > 0;
    }
}