diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/.keep" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Computer.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Computer.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..fda700e9a3f38f9d40e346fb326ee707686e6c00
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Computer.cs"
@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+    class Computer
+    {
+        private string brand;
+
+        public Computer(string brand)
+        {
+            this.brand = brand;
+        }
+
+        private IUSB usb1;
+        private IUSB usb2;
+
+        public string Brand { get => brand; set => brand = value; }
+        internal IUSB Usb1 { get => usb1; set => usb1 = value; }
+        internal IUSB Usb2 { get => usb2; set => usb2 = value; }
+        public void Start()
+        {
+            Console.WriteLine("{0}开机中...",this.brand); 
+        }
+
+        public void ReadData()
+        {
+            this.usb1.Read();
+            this.usb2.Read();
+        }
+
+        public void WriteData()
+        {
+            this.usb1.Write();
+            this.usb2.Write();
+        }
+        public void End() 
+        {
+            Console.WriteLine("{0}关机中...",this.brand);
+        }
+    }
+
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Disk.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Disk.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..40bab812ac6bf351472a66a7187272ec63d6450d
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Disk.cs"
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+    class Disk
+    {
+        private string brand;
+
+        public Disk(string brand)
+        {
+            this.brand = brand;
+        }
+        public Disk() { }
+
+        public string Brand { get => brand; set => brand = value; }
+        public void Info()
+        {
+            Console.WriteLine("{0}品牌的硬盘", this.brand);
+
+        }
+
+    }
+   
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/IUSB.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/IUSB.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..99493bd33306d37d22017f23230ad34f9bf6f9b8
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/IUSB.cs"
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+   interface IUSB
+    {
+        void Read();
+
+
+        void Write();
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/MobileHardDisk.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/MobileHardDisk.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..c72494941397139b1bca383f58cba55aecc5be04
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/MobileHardDisk.cs"
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+    class MobileHardDisk:Disk,IUSB
+    {
+        public MobileHardDisk(string brand) : base(brand) 
+        {
+        
+        }
+
+        public void Read() {
+            Console.WriteLine("移动硬盘正在读取数据中....");
+        }
+        public void Write() {
+            Console.WriteLine("移动硬盘正在写入数据中....");
+        }
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Program.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..3210d48cb2fb08c6973bb82424794e25a8d7f3eb
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Program.cs"
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Udisk ud = new Udisk("金士顿64G");
+            MobileHardDisk mhd = new MobileHardDisk("三星64G");
+
+            ud.Info();
+            ud.Read();
+            ud.Write();
+            Console.WriteLine();
+            mhd.Info();
+            mhd.Read();
+            mhd.Write();
+
+            Console.WriteLine();
+            Computer com = new Computer("联想");
+            com.Start();
+            com.Usb1 = ud;
+            com.Usb2 = mhd;
+            com.WriteData();
+            com.ReadData();
+            
+            com.End();
+
+
+        }
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Udisk.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Udisk.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..6bb5b0bd801d4ca147952e52a8c739168bf80901
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo01/Udisk.cs"
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo01
+{
+    class Udisk:Disk,IUSB
+    {
+        public Udisk(string brand) : base(brand)
+        {
+        
+        }
+        public void Read()
+        {
+            Console.WriteLine("U盘正在读取数据中....");
+        }
+        public void Write() {
+            Console.WriteLine("U盘正在写入数据中....");
+        }
+       }
+    }
+
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Batcar.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Batcar.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..80cdb31be02af8e84e493d21b1f771315bdeb8df
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Batcar.cs"
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo02
+{
+    class Batcar : Car, IFIyable
+    {
+        public Batcar(string brand) : base(brand)
+        { }
+        public void fly()
+        {
+            Console.WriteLine("{0]车在飞",this.Brand);
+
+        }
+        public override void Run()
+        {
+            Console.WriteLine("{0}车在跑",this.Brand);
+        }
+
+      
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Car.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Car.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..b75b65ebb26c35ff778596baee7028dcc7ed3abc
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Car.cs"
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo02
+{
+    abstract class Car
+    {
+        private string brand;
+
+        public string Brand { get; set; }
+
+        public Car(string brand) {
+            Brand = brand;
+        }
+        public abstract void Run();
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/IFIyable.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/IFIyable.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..19c0fc87ac72e03cc3ea0581fea34250999c1f38
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/IFIyable.cs"
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo02
+{
+    interface IFIyable
+    {
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Onecar.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Onecar.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..1f43be8cdd4b8511633e72705c3b93aca9eb8de8
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Onecar.cs"
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo02
+{
+    class Onecar:Car
+    {
+        public Onecar (string brand):base(brand)
+            {
+            
+            }
+        public override void Run()
+        {
+            Console.WriteLine("{0}车在跑",this.Brand);
+        }
+
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Program.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..13d98c4f11a29d80443bd2ca6f7e4cea7fdf12fa
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo02/Program.cs"
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo02
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Onecar oc = new Onecar("一台");
+                oc.Run();
+            Batcar bat = new Batcar("一台蝙蝠");
+            bat.Run();
+            bat.fly();
+        }
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Animal.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Animal.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..e52f12013bdf89ac57dd404783b24c05e2df5571
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Animal.cs"
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+  abstract  class Animal
+    {
+        public abstract void eat();
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Cat.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Cat.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..ce70b938c78396a60c72ee9f28f0a8921792cae3
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Cat.cs"
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    class Cat:Animal,ITree
+    {
+        public void Tree()
+        {
+            Console.WriteLine("猫在爬树");
+
+        }
+
+        public override void eat()
+        {
+            Console.WriteLine("猫在吃饭");
+        }
+
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Dog.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Dog.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..f1e21b14e5452d8314a7b4699dc1307c98c43817
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Dog.cs"
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    class Dog:Animal,ISwim
+    {
+        public void swim()
+        {
+            Console.WriteLine("狗在游泳");
+        }
+        public override void eat()
+        {
+            Console.WriteLine("狗在吃饭");
+        }
+
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Duck.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Duck.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..ada2062b1cdfbb936dc3299152f04deeb144d2c5
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Duck.cs"
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    class Duck:Animal,ISwim
+    {
+        public void swim() 
+        {
+            Console.WriteLine("鸭子在游泳");
+        }
+        public override void eat()
+        {
+            Console.WriteLine("鸭子在吃饭");
+        }
+
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ISwim.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ISwim.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..f6f289d7682384750b88aaa7e321c49f5b1de46f
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ISwim.cs"
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    interface ISwim
+    {
+        void swim();
+
+
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ITree.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ITree.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..dba94012710cc9e0d469b3b7f636bab720fa7f53
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/ITree.cs"
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    interface ITree
+    {
+
+        void Tree();
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Monkey.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Monkey.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..226d659e009248d68a852f4ff27935be46548fba
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Monkey.cs"
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    class Monkey:Animal,ITree
+    {
+
+        public void Tree()
+        {
+            Console.WriteLine("猴子在爬树");
+        }
+
+        public override void eat()
+        {
+            Console.WriteLine("猴子在吃饭");
+        }
+    }
+}
diff --git "a/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Program.cs" "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..3b22c251ef2673624e38671bf8a035d8367751f0
--- /dev/null
+++ "b/\347\254\2542\346\254\241\344\275\234\344\270\232/\347\273\203\346\226\207\346\265\251/Demo03/Program.cs"
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo03
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            ITree tr = new Cat();
+            Tree(tr);
+
+            ISwim sw = new Duck();
+            Swim(sw);
+
+            Animal am = new Dog();
+            eat(am);
+        }
+        
+
+        static void Tree(ITree tr) {
+            tr.Tree();
+        }
+        static void Swim(ISwim sw)
+        {
+            sw.swim();
+        }
+        static void eat(Animal am)
+        {
+            am.eat();
+        }
+          
+    }
+}