From 04292013890d3ae855cd3d5f302a509513f4e5a7 Mon Sep 17 00:00:00 2001
From: gaoxin <793429844@qq.com>
Date: Fri, 28 Jan 2022 14:37:58 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A01..NET=E5=88=9D=E9=98=B6\3.C#?=
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---
 .../ImplicitType.json"                        |   7 ++
 .../ImplicitType.md"                          |  31 +++++
 .../ObjectAndCollectionInitializers.json"     |   7 ++
 .../ObjectAndCollectionInitializers.md"       | 113 ++++++++++++++++++
 .../PartialMethod.json"                       |   7 ++
 .../PartialMethod.md"                         |  52 ++++++++
 .../sample/Program.cs"                        |  73 ++++++++++-
 7 files changed, 289 insertions(+), 1 deletion(-)
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.json"
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.md"
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.json"
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.md"
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.json"
 create mode 100644 "data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.md"

diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.json" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.json"
new file mode 100644
index 0000000..f1145c3
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "Gao996",
+  "source": "ImplicitType.md",
+  "exercise_id": "41982620620243ef956a14e95c584d2d",
+  "notebook_enable": false
+}
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.md" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.md"
new file mode 100644
index 0000000..4cbf609
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ImplicitType.md"
@@ -0,0 +1,31 @@
+# C# 3.0 特性 隐式类型本地变量
+
+从C# 3.0 开始，在方法范围内声明的变量可以具有隐式“类型”var。隐式类型本地变量为强类型，就像用户已经自行声明该类型，但编译器决定类型一样。
+
+```var i = “Hello CSDN！”;```看这句代码，在下列选项中i的类型是：
+
+## 答案
+
+```csharp
+string
+```
+
+## 选项
+
+### A
+
+```csharp
+int
+```
+
+### B
+
+```csharp
+char
+```
+
+### C
+
+```csharp
+double
+```
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.json" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.json"
new file mode 100644
index 0000000..404a1cb
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "Gao996",
+  "source": "ObjectAndCollectionInitializers.md",
+  "exercise_id": "7bb7e2531e7a426cbd731720fa33d0ba",
+  "notebook_enable": false
+}
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.md" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.md"
new file mode 100644
index 0000000..f6d6ac4
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/ObjectAndCollectionInitializers.md"
@@ -0,0 +1,113 @@
+锘�# C# 3.0 鐗规�� 瀵硅薄鍜岄泦鍚堝垵濮嬪�艰瀹氶」
+
+浣跨敤瀵硅薄鍒濆鍊艰瀹氶」锛屼綘鍙互鍦ㄥ垱寤哄璞℃椂鍚戝璞＄殑浠讳綍鍙闂瓧娈垫垨灞炴�у垎閰嶅�硷紝鑰屾棤闇�璋冪敤鍚庤窡璧嬪�艰鍙ヨ鐨勬瀯閫犲嚱鏁般�� 姣斿涓嬮潰鐨凜at绫伙紝浠ュ線鍒涘缓瀵硅薄鍙兘
+```csharp 
+Cat cat = new Cat();
+cat.Name = "Tom";
+cat.Age = 10;
+```
+褰撶劧鍙互鐩存帴涓哄璞¤缃垵濮嬪�硷紝杩欐牱鍙互绠�鍖栧璞＄殑鏋勯�狅紝濡備笅渚嬪瓙锛�
+
+```csharp
+public class Cat
+{
+    // 鑷姩瀹炵幇鐨勫睘鎬�
+    public int Age { get; set; }
+    public string Name { get; set; }
+
+    public Cat()
+    {
+    }
+
+    public Cat(string name)
+    {
+        this.Name = name;
+    }
+}
+```
+```csharp
+Cat cat = new Cat { Age = 10, Name = "Fluffy" };
+Cat sameCat = new Cat("Fluffy"){ Age = 10 };
+```
+涓婇潰杩欐浠ｇ爜绀轰緥浜嗕娇鐢ㄥ叿鏈夊懡鍚嶇被鍨婥at鐨勫璞″垵濮嬪�艰瀹氶」浠ュ強濡備綍璋冪敤鏃犲弬鏁版瀯閫犲嚱鏁般�傚綋鐒朵篃鍙互涓哄尶鍚嶇被鍨嬭缃垵濮嬪�硷細
+```csharp
+var testA = new { name = "Gao", age = 996 };
+```
+涓嬮潰鏄竴涓狶ist闆嗗悎鐨勫垵濮嬪寲渚嬪瓙锛�
+```csharp
+List<int> digits = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; 
+```
+闄や簡鍒嗛厤瀛楁鍜屽睘鎬у锛屽璞″垵濮嬪�艰瀹氶」杩樺彲浠ヨ缃储寮曞櫒锛屽涓嬩緥瀛愶細
+```csharp
+public class MatrixTest
+{
+    private readonly double[,] storage = new double[3, 3];
+
+    public double this[int row, int column]
+    {
+        get { return storage[row, column]; }
+        set { storage[row, column] = value; }
+    }
+}
+```
+```csharp
+var identity = new MatrixTest()
+{
+    [0, 0] = 1.0,
+    [0, 1] = 0.0,
+    [0, 2] = 0.0,
+
+    [1, 0] = 0.0,
+    [1, 1] = 1.0,
+    [1, 2] = 0.0,
+
+    [2, 0] = 0.0,
+    [2, 1] = 0.0,
+    [2, 2] = 1.0
+};
+```
+
+鍦ㄤ簡瑙ｄ簡瀵硅薄鍜岄泦鍚堝垵濮嬪�肩殑璁惧畾涔嬪悗锛屽疄鐜板Dictionary鍒濆鍊艰瀹氾紝浠ヤ笅閫夐」閿欒鐨勬槸锛�
+
+## 绛旀
+
+```csharp
+var numbers = new Dictionary<int, string>()
+{
+    7 = "seven",
+    9 = "nine",
+    13 = "thirteen"
+};
+```
+
+## 閫夐」
+
+### A
+
+```csharp
+var numbers = new Dictionary<int, string>()
+{
+    [1] = "one",
+    [9] = "nine",
+    [13] = "thirteen"
+};
+```
+
+### B
+
+```csharp
+var numbers = new Dictionary<int, string>()
+{
+    {19, "nineteen" },
+    {23, "twenty-three" },
+    {42, "forty-two" }
+};
+```
+
+### C
+
+```csharp
+var numbers = new Dictionary<int, string>()
+{
+};
+```
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.json" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.json"
new file mode 100644
index 0000000..54346b8
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "Gao996",
+  "source": "PartialMethod",
+  "exercise_id": "4a743fa6bf5e49cf8fff28ed0f9e6bef",
+  "notebook_enable": false
+}
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.md" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.md"
new file mode 100644
index 0000000..b727947
--- /dev/null
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/PartialMethod.md"
@@ -0,0 +1,52 @@
+# C# 3.0 特性 分部方法
+
+分部方法在分部类型的一部分中定义了签名，并在该类型的另一部分中定义了实现。比如WPF和WinForm的窗体就是用partial关键字定义的分部类，一部分代码可以实现控件的初始化，一部分可以去实现具体方法等。
+
+```csharp
+partial class PartialClassTest
+{
+    readonly string str = "Hello CSDN!";
+
+    partial void PartialMethodTest();
+
+    public void Display()
+    {
+        PartialMethodTest();
+    }
+}
+
+partial class PartialClassTest
+{
+    partial void PartialMethodTest()
+    {
+        Console.WriteLine(str);
+    }
+}
+```
+上面这段代码示例了分部类和方法，执行```Display()```方法在下列选项中可以打印出的字符串是：
+
+## 答案
+
+```csharp
+Hello CSDN!
+```
+
+## 选项
+
+### A
+
+```csharp
+str
+```
+
+### B
+
+```csharp
+null
+```
+
+### C
+
+```csharp
+抛出异常
+```
\ No newline at end of file
diff --git "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/sample/Program.cs" "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/sample/Program.cs"
index f4d1c02..e343d40 100644
--- "a/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/sample/Program.cs"
+++ "b/data/1..NET\345\210\235\351\230\266/3.C#\347\211\271\346\200\247/1.C#3.0\347\211\271\346\200\247/sample/Program.cs"
@@ -63,5 +63,76 @@ public static class Extensions
 }
 
 // 闅愬紡绫诲瀷鏈湴鍙橀噺
+var i = 鈥淗ello CSDN锛佲��;
+
 // 鍒嗛儴鏂规硶
-// 瀵硅薄鍜岄泦鍚堝垵濮嬪�艰瀹氶」
\ No newline at end of file
+partial class PartialClassTest
+{
+    readonly string str = "Hello CSDN!";
+
+    partial void PartialMethodTest();
+
+    public void Display()
+    {
+        PartialMethodTest();
+    }
+}
+
+partial class PartialClassTest
+{
+    partial void PartialMethodTest()
+    {
+        Console.WriteLine(str);
+    }
+}
+
+
+// 瀵硅薄鍜岄泦鍚堝垵濮嬪�艰瀹氶」
+public class Cat
+{
+    // 鑷姩瀹炵幇鐨勫睘鎬�
+    public int Age { get; set; }
+    public string Name { get; set; }
+
+    public Cat()
+    {
+    }
+
+    public Cat(string name)
+    {
+        this.Name = name;
+    }
+}
+
+Cat cat = new Cat { Age = 10, Name = "Fluffy" };
+Cat sameCat = new Cat("Fluffy"){ Age = 10 };
+
+var testA = new { name = "Gao", age = 996 };
+
+List<int> digits = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; 
+
+public class MatrixTest
+{
+    private readonly double[,] storage = new double[3, 3];
+
+    public double this[int row, int column]
+    {
+        get { return storage[row, column]; }
+        set { storage[row, column] = value; }
+    }
+}
+
+var identity = new MatrixTest()
+{
+    [0, 0] = 1.0,
+    [0, 1] = 0.0,
+    [0, 2] = 0.0,
+
+    [1, 0] = 0.0,
+    [1, 1] = 1.0,
+    [1, 2] = 0.0,
+
+    [2, 0] = 0.0,
+    [2, 1] = 0.0,
+    [2, 2] = 1.0
+};
\ No newline at end of file
-- 
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