Modernize C# snippets (System.Collections)

snippets/csharp/System.Collections/ArrayList/Add/source.cs

@@ -1,55 +1,61 @@
 // <Snippet1>
- using System;
- using System.Collections;
- public class SamplesArrayList  {
-
-    public static void Main()  {
-
-       // Creates and initializes a new ArrayList.
-       ArrayList myAL = new ArrayList();
-       myAL.Add( "The" );
-       myAL.Add( "quick" );
-       myAL.Add( "brown" );
-       myAL.Add( "fox" );
-
-       // Creates and initializes a new Queue.
-       Queue myQueue = new Queue();
-       myQueue.Enqueue( "jumps" );
-       myQueue.Enqueue( "over" );
-       myQueue.Enqueue( "the" );
-       myQueue.Enqueue( "lazy" );
-       myQueue.Enqueue( "dog" );
-
-       // Displays the ArrayList and the Queue.
-       Console.WriteLine( "The ArrayList initially contains the following:" );
-       PrintValues( myAL, '\t' );
-       Console.WriteLine( "The Queue initially contains the following:" );
-       PrintValues( myQueue, '\t' );
-
-       // Copies the Queue elements to the end of the ArrayList.
-       myAL.AddRange( myQueue );
-
-       // Displays the ArrayList.
-       Console.WriteLine( "The ArrayList now contains the following:" );
-       PrintValues( myAL, '\t' );
+using System;
+using System.Collections;
+public class SamplesArrayList
+{
+
+    public static void Main()
+    {
+
+        // Creates and initializes a new ArrayList.
+        ArrayList myAL = new();
+        myAL.Add("The");
+        myAL.Add("quick");
+        myAL.Add("brown");
+        myAL.Add("fox");
+
+        // Creates and initializes a new Queue.
+        Queue myQueue = new();
+        myQueue.Enqueue("jumps");
+        myQueue.Enqueue("over");
+        myQueue.Enqueue("the");
+        myQueue.Enqueue("lazy");
+        myQueue.Enqueue("dog");
+
+        // Displays the ArrayList and the Queue.
+        Console.WriteLine("The ArrayList initially contains the following:");
+        PrintValues(myAL, '\t');
+        Console.WriteLine("The Queue initially contains the following:");
+        PrintValues(myQueue, '\t');
+
+        // Copies the Queue elements to the end of the ArrayList.
+        myAL.AddRange(myQueue);
+
+        // Displays the ArrayList.
+        Console.WriteLine("The ArrayList now contains the following:");
+        PrintValues(myAL, '\t');
     }
 
-    public static void PrintValues( IEnumerable myList, char mySeparator )  {
-       foreach ( Object obj in myList )
-          Console.Write( "{0}{1}", mySeparator, obj );
-       Console.WriteLine();
+    public static void PrintValues(IEnumerable myList, char mySeparator)
+    {
+        foreach (object obj in myList)
+        {
+            Console.Write($"{mySeparator}{obj}");
+        }
+
+        Console.WriteLine();
     }
- }
+}
 
 
- /*
- This code produces the following output.
+/*
+This code produces the following output.
 
- The ArrayList initially contains the following:
-     The    quick    brown    fox
- The Queue initially contains the following:
-     jumps    over    the    lazy    dog
- The ArrayList now contains the following:
-     The    quick    brown    fox    jumps    over    the    lazy    dog
- */
+The ArrayList initially contains the following:
+    The    quick    brown    fox
+The Queue initially contains the following:
+    jumps    over    the    lazy    dog
+The ArrayList now contains the following:
+    The    quick    brown    fox    jumps    over    the    lazy    dog
+*/
 // </Snippet1>

snippets/csharp/System.Collections/ArrayList/BinarySearch/Program.cs

@@ -0,0 +1,2 @@
+SamplesArrayList.Run();
+MyArrayList.Run();

snippets/csharp/System.Collections/ArrayList/BinarySearch/Project.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
-    <StartupObject>SamplesArrayList</StartupObject>
   </PropertyGroup>
 
 </Project>

snippets/csharp/System.Collections/ArrayList/BinarySearch/source.cs

@@ -1,49 +1,62 @@
-// <Snippet1>
- using System;
- using System.Collections;
- public class SamplesArrayList  {
-
-    public static void Main()  {
-
-       // Creates and initializes a new ArrayList. BinarySearch requires
-       // a sorted ArrayList.
-       ArrayList myAL = new ArrayList();
-       for ( int i = 0; i <= 4; i++ )
-          myAL.Add( i*2 );
-
-       // Displays the ArrayList.
-       Console.WriteLine( "The int ArrayList contains the following:" );
-       PrintValues( myAL );
-
-       // Locates a specific object that does not exist in the ArrayList.
-       Object myObjectOdd = 3;
-       FindMyObject( myAL, myObjectOdd );
-
-       // Locates an object that exists in the ArrayList.
-       Object myObjectEven = 6;
-       FindMyObject( myAL, myObjectEven );
+// <Snippet1>
+using System;
+using System.Collections;
+public class SamplesArrayList
+{
+
+    public static void Run()
+    {
+
+        // Creates and initializes a new ArrayList. BinarySearch requires
+        // a sorted ArrayList.
+        ArrayList myAL = [];
+        for (int i = 0; i <= 4; i++)
+        {
+            myAL.Add(i * 2);
+        }
+
+        // Displays the ArrayList.
+        Console.WriteLine("The int ArrayList contains the following:");
+        PrintValues(myAL);
+
+        // Locates a specific object that does not exist in the ArrayList.
+        object myObjectOdd = 3;
+        FindMyObject(myAL, myObjectOdd);
+
+        // Locates an object that exists in the ArrayList.
+        object myObjectEven = 6;
+        FindMyObject(myAL, myObjectEven);
     }
 
-    public static void FindMyObject( ArrayList myList, Object myObject )  {
-       int myIndex=myList.BinarySearch( myObject );
-       if ( myIndex < 0 )
-          Console.WriteLine( "The object to search for ({0}) is not found. The next larger object is at index {1}.", myObject, ~myIndex );
-       else
-          Console.WriteLine( "The object to search for ({0}) is at index {1}.", myObject, myIndex );
+    public static void FindMyObject(ArrayList myList, object myObject)
+    {
+        int myIndex = myList.BinarySearch(myObject);
+        if (myIndex < 0)
+        {
+            Console.WriteLine($"The object to search for ({myObject}) is not found. The next larger object is at index {~myIndex}.");
+        }
+        else
+        {
+            Console.WriteLine($"The object to search for ({myObject}) is at index {myIndex}.");
+        }
     }
 
-    public static void PrintValues( IEnumerable myList )  {
-       foreach ( Object obj in myList )
-          Console.Write( "   {0}", obj );
-       Console.WriteLine();
+    public static void PrintValues(IEnumerable myList)
+    {
+        foreach (object obj in myList)
+        {
+            Console.Write($"   {obj}");
+        }
+
+        Console.WriteLine();
     }
- }
- /*
- This code produces the following output.
-
- The int ArrayList contains the following:
-    0   2   4   6   8
- The object to search for (3) is not found. The next larger object is at index 2.
- The object to search for (6) is at index 3.
- */
+}
+/*
+This code produces the following output.
+
+The int ArrayList contains the following:
+   0   2   4   6   8
+The object to search for (3) is not found. The next larger object is at index 2.
+The object to search for (6) is at index 3.
+*/
 // </Snippet1>

snippets/csharp/System.Collections/ArrayList/BinarySearch/source2.cs

@@ -13,28 +13,29 @@ int IComparer.Compare(object x, object y)
 
 public class MyArrayList : ArrayList
 {
-    public static void Main()
+    public static void Run()
     {
         // Creates and initializes a new ArrayList.
-        MyArrayList coloredAnimals = new MyArrayList();
-
-        coloredAnimals.Add("White Tiger");
-        coloredAnimals.Add("Pink Bunny");
-        coloredAnimals.Add("Red Dragon");
-        coloredAnimals.Add("Green Frog");
-        coloredAnimals.Add("Blue Whale");
-        coloredAnimals.Add("Black Cat");
-        coloredAnimals.Add("Yellow Lion");
+        MyArrayList coloredAnimals =
+        [
+            "White Tiger",
+            "Pink Bunny",
+            "Red Dragon",
+            "Green Frog",
+            "Blue Whale",
+            "Black Cat",
+            "Yellow Lion",
+        ];
 
         // BinarySearch requires a sorted ArrayList.
         coloredAnimals.Sort();
 
-        // Compare results of an iterative search with a binary search
+        // Compare results of an iterative search with a binary search.
         int index = coloredAnimals.IterativeSearch("White Tiger");
-        Console.WriteLine("Iterative search, item found at index: {0}", index);
+        Console.WriteLine($"Iterative search, item found at index: {index}");
 
         index = coloredAnimals.BinarySearch("White Tiger", new SimpleStringComparer());
-        Console.WriteLine("Binary search, item found at index:    {0}", index);
+        Console.WriteLine($"Binary search, item found at index:    {index}");
     }
 
     public int IterativeSearch(object finditem)