Add CSharp12GrammarExercise

Author: YSGStudyHards

DotNetGuidePractice/HelloDotNetGuide/CSharp语法/CSharp12GrammarExercise.cs

@@ -0,0 +1,103 @@
+using PointTest = (int item1, int item2);
+
+namespace HelloDotNetGuide.CSharp语法
+{
+    public class CSharp12GrammarExercise
+    {
+        public static void OutputPrint()
+        {
+            //使用 using 关键字为元组类型创建别名，并进行调用：
+            PointTest point = (10, 20);
+            Console.WriteLine($"输出：Item1={point.Item1}, Item2={point.Item2}");
+
+            //InlineArrays();
+            //CollectionExpressions();
+            //var person = new Person("追逐时光者", 30);
+            //Console.WriteLine($"{person.Name}, {person.Age}");
+
+            //// 创建 Distance 结构体实例
+            //Distance distance = new Distance(10, 55);
+            //// 访问 Magnitude 和 Direction 属性
+            //Console.WriteLine($"Magnitude: {distance.Magnitude}，Direction: {distance.Direction}");
+        }
+
+        #region 默认 lambda 参数
+
+        public static void DefaultLambdaParameters()
+        {
+            Func<double, double> testcube = x => x * x * x;
+            Func<int, int, bool> testForEquality = (x, y) => x == y;
+            Func<int, string, bool> isTooLong = (int x, string s) => s.Length > x;
+        }
+
+        #endregion
+
+        #region 集合表达式
+
+        public static void CollectionExpressions()
+        {
+            // 创建一个数组
+            int[] array = [55, 99, 100, 33];
+
+            // 创建一个列表
+            List<string> list = ["one", "two", "three", "five", "追逐时光者"];
+
+            // 创建一个 Span
+            Span<char> span = ['a', 'b', 'c', 'd', 'e', 'f', 'h', 'i', 'k'];
+
+            // 创建一个交错二维数组
+            int[][] two2D = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [88, 8, 9]];
+
+            int[] item0 = [88, 2, 3];
+            int[] item1 = [22, 5, 6];
+            int[] item2 = [7, 99, 9];
+            int[] totalList = [.. item0, .. item1, .. item2];
+            foreach (var element in totalList)
+            {
+                Console.Write($"{element}, ");
+            }
+        }
+
+        #endregion
+
+        #region 内联数组
+
+        public static void InlineArrays()
+        {
+            var buffer = new Buffer();
+            for (int i = 0; i < 20; i++)
+            {
+                buffer[i] = i;
+            }
+
+            foreach (var i in buffer)
+            {
+                Console.WriteLine(i);
+            }
+        }
+
+        #endregion
+    }
+
+    #region 主构造函数
+
+    public readonly struct Distance(double dx, double dy)
+    {
+        public readonly double Magnitude { get; } = Math.Sqrt(dx * dx + dy * dy);
+        public readonly double Direction { get; } = Math.Atan2(dy, dx);
+    }
+
+    public class Person(string name, int age)
+    {
+        public string Name => name;
+        public int Age => age;
+    }
+
+    #endregion
+
+    [System.Runtime.CompilerServices.InlineArray(20)]
+    public struct Buffer
+    {
+        private int _element0;
+    }
+}

DotNetGuidePractice/HelloDotNetGuide/HelloDotNetGuide.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

DotNetGuidePractice/HelloDotNetGuide/Program.cs

@@ -11,6 +11,12 @@ static void Main(string[] args)
         {
             Console.WriteLine("欢迎来到DotNetGuide练习空间！！！");
 
+            #region CSharp12GrammarExercise
+
+            CSharp12GrammarExercise.OutputPrint();
+
+            #endregion
+
             #region GotoExercise
 
             //GotoExercise.GotoRetryUseExample();