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

SomeOfCSharpFeatures/PropertiesIndexersRefOut/Triple.cs

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+namespace PropertiesIndexersRefOut;
+
+public class Triple
+{
+  private int first;
+  public int First
+  {
+    get
+    {
+      return first;
+    }
+    set
+    {
+      first = value;
+    }
+  }
+
+  public int Second { get; set; }
+
+  public int Third => First + Second;
+  public override string ToString()
+  {
+    return $"({First}, {Second}, {Third})";
+  }
+
+  #region Indexer
+  public int this[string s, int position]  
+  {      
+    get
+    {        
+      int num;
+      switch (s)
+      {
+        case "A":
+          num = this.First;
+          break;
+        case "B":
+          num = this.Second;
+          break;
+        case "C":
+          num = this.Third;
+          break;
+        default:
+          throw new ArgumentException("Invalid position in triple (should be A, B, or C)");
+      }
+      int digit = 0;
+      while(num > 0 && position > 0)
+      {
+        digit = num % 10;
+        num /= 10;
+        position--;
+      }
+      return digit;
+    }
+  }
+  #endregion
+
+
+  #region Operator overloading
+  public static Triple operator +(Triple x, Triple y)
+  {    
+    return new Triple
+    {
+      First = x.First + y.First,
+      Second = x.Second + y.Second
+    };
+  }
+  #endregion
+
+
+
+
+}