public A3(U u, V v)
{
A1 a1 = new A1();
A2 a2 = new A2();
a1.log();
a2.log();
}
static void Main(string[] args)
{
//c#中的可空类型
int a = 0;
int?b = null;
Console.WriteLine("a = {0}, b = {1}", a, b);
//泛型demo1
var num = new NumberCollection();
Console.WriteLine("====输出所有元素=======");
num.Print();
//自定义排序
num.Sort(NumberCollectionDelegate.CompareDelegate);
Console.WriteLine("=========自定义排序=========");
num.Print();
//自定义谓词 查找
var num1 = new NumberCollection(num.FindAll(NumberCollectionDelegate.Predicate));
Console.WriteLine("========自定义谓词查找=========");
num1.Print();
Dictionary <int, string> paras = new Dictionary <int, string>();
paras.Add(0, "0000");
paras.Add(1, "1111");
paras.Add(2, "2222");
Console.WriteLine("输出key value");
foreach (KeyValuePair <int, string> kv in paras)
{
Console.WriteLine("key = {0}, value = {1}", kv.Key, kv.Value);
}
//基类约束
A1 a1 = new A1();
A2 a2 = new A2();
A3 <A1, A2> a3 = new A3 <A1, A2>(a1, a2);
//接口约束
UU u = new UU();
VV v = new VV();
BB <UU, VV> bb = new BB <UU, VV>(u, v);
//构造器约束 两种情况都是走不带参数的构造器
Console.WriteLine("===构造器约束不带参数的情况====");
C3 <C1> c311 = new C3 <C1>();
C3 <C2> c321 = new C3 <C2>();
Console.WriteLine("====构造器约束带参数的情况====");
C3 <C1> c31 = new C3 <C1>("c1");
C3 <C2> c32 = new C3 <C2>("c2");
//泛型约束的值约束与引用约束
D3 <int> d1 = new D3 <int>();
//报错：u不是值类型
//D3<u> d2 = new D3<u>();
D4 <C2> d4 = new D4 <C2>();
Console.Read();
}