add

.gitignore

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+bin
+obj

README.md

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+# C-sharp Training
+
+- [Download .NET SDK](https://dotnet.microsoft.com/download)
+- [Install the C# extension](https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp)
+- Create a new project as follows.
+```
+dotnet new console -o app
+cd app
+code .
+```
+- Build your project
+```bash
+dotnet build
+```
+- Run your project
+```bash
+dotnet run
+```

app/.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/net7.0/app.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

app/.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/app.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/app.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/app.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

app/Program.cs

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+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");
+Console.WriteLine("youssef is awesome!");
+
+// variables
+short aShort = 1;
+byte aByte = 8;
+int a = 22;
+string s = "youssef";
+float w = 155.5f;
+double d = 188.8d;
+bool b = false;
+
+Console.WriteLine($"a={a}, s={s}, w={w}, b={b}, d={d}, aShort={aShort}, aByte={aByte}");
+
+// declaration
+int x;
+int y;
+
+// assignment
+x = 22;
+y = 33;
+
+Console.WriteLine($"x={x}, y={y}");

app/app.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

app1/Program.cs

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+int a = 10;
+int b = 11;
+int c = a + b;
+int d = a - b;
+int e = a * b;
+int f = a / b;
+double g = a / (double)b;
+int h = a % b;
+
+
+Console.WriteLine($"{a} + {b} = {c}");
+Console.WriteLine($"{a} - {b} = {d}");
+Console.WriteLine($"{a} * {b} = {e}");
+Console.WriteLine($"{a} / {b} = {f}");
+Console.WriteLine($"{a} / {b} = {g}");
+Console.WriteLine($"{a} % {b} = {h}");

app1/app1.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>