diff --git "a/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/.keep" "b/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Person.cs" "b/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Person.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..8b8545bd5db88a7981d1fddaeb68aedb5a90c3f2
--- /dev/null
+++ "b/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Person.cs"
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ConsoleApp1
+{
+    //设计一个Person抽象类，包含吃饭学习运动3种行为，
+    abstract class Person
+    {
+        public void eat() { }
+        public void study() { }
+        public void run() { }
+    }
+    //设计一个接口   考试，  只有学生和老师会考试
+    interface Iks
+    {
+        public void ks() { }
+    }
+    //分为工人，学生，老师2种职业
+    class gr
+    {
+
+    }
+    class student:Iks
+    {
+        public void ks()
+        {
+            Console.WriteLine("学生会考试");
+        }
+    }
+    class ls:Iks
+    {
+        public void ks()
+        {
+            Console.WriteLine("老师会考试");
+        }
+    }
+}
diff --git "a/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Program.cs" "b/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..3632e19abf53da5e0854aa3dc28625ebad29e636
--- /dev/null
+++ "b/01\347\277\201\347\253\240\345\275\254/isas\344\275\234\344\270\232/Program.cs"
@@ -0,0 +1,59 @@
+using System;
+
+namespace ConsoleApp1
+{
+    class Program
+    {
+        //设计一个方法， 模拟让人进入考场， 要求只有会考试的人才能进入，并考试。 
+        static void Main(string[] args)
+        {
+            gr g = new gr();
+            student s = new student();
+            ls l = new ls();
+            for (;;)
+            {
+                string n = Console.ReadLine();
+                if (n=="工人")
+                {
+                    if (g is Iks)
+                    {
+                        Iks i = (Iks)g;
+                        i.ks();
+                        Console.WriteLine("进入考场，并考试");
+                    }
+                    else
+                    {
+                        Console.WriteLine("不能进入考场");
+                    }
+                }
+                else if (n == "学生")
+                {
+                    if (s is Iks)
+                    {
+                        Iks i = (Iks)s;
+                        i.ks();
+                        Console.WriteLine("进入考场，并考试");
+                    }
+                    else
+                    {
+                        Console.WriteLine("不能进入考场");
+                    }
+                }
+                else if (n == "老师")
+                {
+                    Iks i = l as Iks;
+                    if (l != null)
+                    {
+                        //Iks i = (Iks)l;
+                        i.ks();
+                        Console.WriteLine("进入考场，并考试");
+                    }
+                    else
+                    {
+                        Console.WriteLine("不能进入考场");
+                    }
+                }
+            }
+        }
+    }
+}
diff --git "a/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/.keep" "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/1/.keep" "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/1/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/1/Program.cs" "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/1/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..8942d24f2a31502a5f7702fa39e392ae2d8e2b88
--- /dev/null
+++ "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/1/Program.cs"
@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+
+namespace ConsoleApp1
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            //1.定义两个存放(int)的集合，
+            //集合listA {“a”,”b”,”c”,”d”,”e”}
+            //listB {“d”,”e”,”f”,”g”,”h”},
+            //将这两个集合去除重复项后合并成一个集合。 Contains
+            List<int> listA = new List<int> { };
+            List<int> listB = new List<int> { };
+            int[] a = new int[] { 'a', 'b', 'c', 'd', 'e' };
+            int[] b = new int[] { 'd', 'e', 'f', 'g', 'h' };
+            listA.AddRange(a);
+            listB.AddRange(b);
+            Console.WriteLine(string.Join(" ",listA));
+            Console.WriteLine(string.Join(" ", listB));
+            int o = 5;
+            int p = 5;
+            listA.Contains(o);
+            for (int i = 0; i < o; i++)
+            {
+                if (listA.Contains(listB[i]))
+                {
+                    listB.RemoveAt(i);
+                    i--;
+                    o--;
+                }
+            }
+            //for (int i = 0; i < o; i++)
+            //{
+            //    for (int j = 0; j < p; j++)
+            //    {
+            //        //Console.WriteLine(listA[i]+"\t"+listB[j]);
+            //        if (listA[i] == listB[j])
+            //        {
+            //            listA.RemoveAt(i);
+            //            o--;
+            //            i--;
+            //            listB.RemoveAt(j);
+            //            j--;
+            //            p--;
+            //        }
+            //    }
+            //}
+            Console.WriteLine(string.Join(" ", listA));
+            Console.WriteLine(string.Join(" ", listB));
+            List<int> list = new List<int> { };
+            list.AddRange(listA);
+            list.AddRange(listB);
+            Console.WriteLine(string.Join(" ", list));
+        }
+    }
+}
diff --git "a/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/2/.keep" "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/2/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/2/Program.cs" "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/2/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..3e3989c0279716e4f76bbf53654542e0e3ca77c1
--- /dev/null
+++ "b/01\347\277\201\347\253\240\345\275\254/\346\263\233\345\236\213\351\233\206\345\220\210\344\275\234\344\270\232/2/Program.cs"
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+
+namespace ConsoleApp4
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            //4.分拣奇偶数 int[]{ 1,2,3,4,5,6,7,8,9}
+            List<int> ji = new List<int> { };
+            List<int> ou = new List<int> { };
+            int[] a = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+            ji.AddRange(a);
+            ou.AddRange(a);
+            ji.RemoveAll(x => x % 2 == 0);
+            ou.RemoveAll(x => x % 2 != 0);
+            Console.Write("奇数:");
+            Console.WriteLine(string.Join(" ", ji));
+            Console.Write("偶数:");
+            Console.WriteLine(string.Join(" ", ou));
+        }
+    }
+}