add draft post about .NET 10 LTS and C# 14

Author: neiesc

content/2019-12-09-charp-14.md

@@ -0,0 +1,68 @@
+---
+tags: hardskill, csharp, dotnet
+stream: draft
+---
+
+# Bem vindo C# 14 & .NET 10 LTS
+## Instalando .NET 10.0 no linux via CLI
+```sh
+curl -fsSL https://builds.dotnet.microsoft.com/dotnet/scripts/v1/dotnet-install.sh | bash /dev/stdin -c 10.0
+```
+
+## Sha-bang com C#
+```sh
+echo "#\!/bin/dotnet
+using System;
+Console.WriteLine(\"Hello, world\!\");" > script.cs
+
+chmod +x script.cs
+./script.cs
+```
+
+## File-based apps
+```sh
+dotnet run app.cs
+```
+
+## Null-conditional assignment
+Antes do C# 14:
+```csharp
+if (customer is not null)
+{
+    customer.Order = GetCurrentOrder();
+}
+```
+
+Depois do C# 14:
+```csharp
+customer?.Order = GetCurrentOrder();
+```
+
+## Membros de extensão
+Antes do C# 14:
+```csharp
+public static class String
+{
+    public static int WordCount(this string str) => str.split([' ', '.', '?'], StringSplitOptions.RemoveEmptyEnties).Length;
+}
+```
+
+Depois do C# 14:
+```csharp
+public static class String
+{
+    extension(string str)
+    {
+        public int WordCount() => str.split([' ', '.', '?'], StringSplitOptions.RemoveEmptyEnties).Length;
+    }
+}
+```
+
+## Referencias
+- https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-14
+- https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-10/
+- https://devblogs.microsoft.com/dotnet/csharp-exploring-extension-members/
+- https://andrewlock.net/exploring-dotnet-10-preview-features-3-csharp-14-extensions-members/
+- https://www.reddit.com/r/csharp/comments/1jsuj5n/exploring_the_new_field_keyword_in_c_14_with_net/
+- https://www.youtube.com/playlist?list=PLUOequmGnXxMQy-vu2O5VUFAdhu1fE5bY
+- https://www.infoworld.com/article/4000493/c-sharp-14-introduces-file-based-apps.html