Nu är det ordning på funktionaliteten när det gäller att hantera spelare nya spelronder och den poänghistorik som lagras

GreadyPoang.Common/Base/BehaviorBase.cs

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+namespace GreadyPoang.Common;
+
+public class BehaviorBase<T> : Behavior<T> where T : BindableObject
+{
+    public T AssociatedObject { get; private set; }
+
+    protected override void OnAttachedTo(T bindable)
+    {
+        base.OnAttachedTo(bindable);
+        AssociatedObject = bindable;
+
+        if (bindable.BindingContext != null)
+            BindingContext = bindable.BindingContext;
+
+        bindable.BindingContextChanged += OnBindingContextChanged;
+    }
+
+    protected override void OnDetachingFrom(T bindable)
+    {
+        base.OnDetachingFrom(bindable);
+        bindable.BindingContextChanged -= OnBindingContextChanged;
+        AssociatedObject = null;
+    }
+
+    void OnBindingContextChanged(object sender, EventArgs e)
+    {
+        BindingContext = AssociatedObject.BindingContext;
+    }
+}

GreadyPoang.Common/GreadyPoang.Common.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+	
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Maui.Controls" Version="9.0.100" />
+	</ItemGroup>
+
+
+	</Project>

GreadyPoang.Common/Specifics/DigitsOnlyBehavior.cs

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+using System.Text.RegularExpressions;
+
+namespace GreadyPoang.Common;
+
+public class DigitsOnlyBehavior : Behavior<Entry>
+{
+    protected override void OnAttachedTo(Entry entry)
+    {
+        entry.TextChanged += OnTextChanged;
+        base.OnAttachedTo(entry);
+    }
+
+    protected override void OnDetachingFrom(Entry entry)
+    {
+        entry.TextChanged -= OnTextChanged;
+        base.OnDetachingFrom(entry);
+    }
+
+    private void OnTextChanged(object sender, TextChangedEventArgs e)
+    {
+        var entry = sender as Entry;
+        if (entry == null) return;
+
+        // Tillåt endast siffror (0–9)
+        if (!Regex.IsMatch(e.NewTextValue, @"^\d*$"))
+        {
+            entry.Text = e.OldTextValue; // Återställ till tidigare giltigt värde
+        }
+        /*
+         *  Vill du tillåta decimaler? Ändra regex till @"^\d*\.?\d*$"
+            Vill du tillåta negativa tal? Använd @"^-?\d*$"
+            Vill du visa en varning när användaren skriver fel? 
+                Lägg till en BindableProperty för IsValid och bind den till UI.
+         * 
+         */
+
+    }
+}

GreadyPoang.Common/Specifics/EventToCommandBehavior.cs

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+using System.Reflection;
+using System.Windows.Input;
+
+namespace GreadyPoang.Common;
+public class EventToCommandBehavior : BehaviorBase<VisualElement>
+{
+    public string EventName { get; set; }
+
+    public static readonly BindableProperty CommandProperty =
+        BindableProperty.Create(nameof(Command), typeof(ICommand), typeof(EventToCommandBehavior));
+
+    public ICommand Command
+    {
+        get => (ICommand)GetValue(CommandProperty);
+        set => SetValue(CommandProperty, value);
+    }
+
+    private EventInfo eventInfo;
+    private Delegate eventHandler;
+
+    protected override void OnAttachedTo(VisualElement bindable)
+    {
+        base.OnAttachedTo(bindable);
+
+        if (bindable == null || string.IsNullOrEmpty(EventName))
+            return;
+
+        eventInfo = bindable.GetType().GetRuntimeEvent(EventName);
+        if (eventInfo == null)
+            throw new ArgumentException($"Event '{EventName}' not found on type '{bindable.GetType().Name}'");
+
+        MethodInfo methodInfo = typeof(EventToCommandBehavior).GetTypeInfo().GetDeclaredMethod(nameof(OnEvent));
+        eventHandler = methodInfo.CreateDelegate(eventInfo.EventHandlerType, this);
+        eventInfo.AddEventHandler(bindable, eventHandler);
+    }
+
+    protected override void OnDetachingFrom(VisualElement bindable)
+    {
+        base.OnDetachingFrom(bindable);
+
+        if (eventInfo != null && eventHandler != null)
+            eventInfo.RemoveEventHandler(bindable, eventHandler);
+    }
+
+    private void OnEvent(object sender, object eventArgs)
+    {
+        if (Command?.CanExecute(eventArgs) == true)
+            Command.Execute(eventArgs);
+    }
+}