Add project files.

Sortering.slnx

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+<Solution>
+  <Project Path="Sortering/Sortering.csproj" />
+</Solution>

Sortering/Program.cs

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+using Sortering;
+using System.Diagnostics;
+
+internal class Program
+{
+    private static int[] _ints;
+    private static bool _running = true;
+
+    private static Random _random = new Random();
+
+    private static Dictionary<string, Action<string[]>> Commands =
+        new Dictionary<string, Action<string[]>>(StringComparer.OrdinalIgnoreCase)
+        {
+            { "insertionsort", SortInsertion },
+            { "bubblesort", SortBubble },
+            { "mkarray", MkArray },
+            { "cat", Cat },
+        };
+
+    private static void Main(string[] args)
+    {
+        while (_running)
+        {
+            Console.Write("> ");
+            var input = Console.ReadLine();
+            if (string.IsNullOrWhiteSpace(input)) continue;
+
+            var parts = input.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+            var cmd = parts[0];
+            var cmdArgs = parts.Length > 1 ? parts[1..] : Array.Empty<string>();
+
+            if (Commands.TryGetValue(cmd, out var action))
+                action(cmdArgs);
+            else
+            {
+                Console.WriteLine("Unknown command, commands available are:");
+                foreach (var kvp in Commands)
+                {
+                    Console.WriteLine(kvp.Key);
+                }
+            }
+            
+        }
+    }
+
+    private static void SortInsertion(string[] strings)
+    {
+        Stopwatch sw = new Stopwatch();
+        sw.Start();
+
+        Sort.InsertionSort(_ints);
+
+        long timeElapsed = sw.ElapsedMilliseconds;
+        Console.WriteLine("Sorted array in " + timeElapsed.ToString() + "ms");
+    }
+
+    private static void SortBubble(string[] strings)
+    {
+        Stopwatch sw = new Stopwatch();
+        sw.Start();
+
+        Sort.BubbleSort(_ints);
+
+        long timeElapsed = sw.ElapsedMilliseconds;
+        Console.WriteLine("Sorted array in " + timeElapsed.ToString() + "ms");
+    }
+
+    private static void Cat(string[] strings)
+    {
+        for (int i = 0; i < _ints.Length; i++)
+        {
+            Console.WriteLine(_ints[i]);
+        }
+    }
+
+
+    private static void MkArray(string[] strings)
+    {
+        if (strings.Length < 1) return;
+
+        int count = int.Parse(strings[0]);
+
+        _ints = new int[count];
+
+        for (int i=0; i< count; i++)
+        {
+            _ints[i] = _random.Next(count);
+        }
+
+        Console.WriteLine("Created array with " + strings[0] + " indices");
+    }
+}

Sortering/Sort.cs

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+namespace Sortering
+{
+    public static class Sort
+    {
+        public static void InsertionSort(int[] array)
+        {
+            int i, n;
+            int length = array.Length;
+            int temp;
+
+            if (length < 2) return;
+
+            for (n=1; n<length; n++)
+            {
+                temp = array[n];
+                i = n - 1;
+
+                while (i >= 0 && array[i] > temp)
+                {
+                    array[i+1] = array[i];
+                    i--;
+                }
+
+                array[i+1] = temp;
+            }
+        }
+
+        public static void BubbleSort(int[] array)
+        {
+            for (int m = array.Length-1; m > 0; m--)
+            {
+                for (int n = 0; n<m; n++)
+                {
+                    if (array[n] > array[n + 1])
+                    {
+                        int temp = array[n];
+                        array[n] = array[n+1];
+                        array[n+1] = temp;
+                    }
+                }
+            }
+        }
+    }
+}

Sortering/Sortering.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>