PI06 i PI06-1. Docker definitions for MSSQL and Postgres. Data seeder/generator for countries and people. Entity Framework example with variants for Postgres and MSSQL

DefensiveProgramming/Using/C.cs

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+namespace Using;
+
+  class C : IDisposable
+  {
+	public string Id { get; set; }
+	public void Dispose()
+	{			
+		Console.WriteLine("**  {0} : Dispose **", Id);
+	}
+
+	public C(string id)
+	{
+		Id = id;
+		Console.WriteLine("----> {0} : Ctor", Id);
+	}
+}

DefensiveProgramming/Using/Program.cs

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+using Using;
+
+try
+{
+  C a1 = new C("A1");
+
+  using (C b2 = new C("B2"))
+  using (C d4 = new C("D4"))
+  {
+    C c3 = new C("C3");
+    throw new Exception("It is time for an exception");
+  }
+  a1.Dispose();
+}
+catch (Exception exc)
+{
+  Console.WriteLine("Exc: " + exc.Message);
+  //throw exc;
+  //throw;
+}

DefensiveProgramming/Using/Using.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>