Add project files.

UI/WPF/Helpers/AnimationHelper.cs

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+using System;
+using System.Windows;
+using System.Windows.Media.Animation;
+
+namespace TheXamlGuy.UI.WPF;
+
+public class AnimationHelper
+{
+    public static ThicknessAnimation CreateAnimation(Thickness thickness = default, double milliseconds = 200)
+    {
+        return new(thickness, new Duration(TimeSpan.FromMilliseconds(milliseconds)))
+        {
+            EasingFunction = new PowerEase { EasingMode = EasingMode.EaseInOut }
+        };
+    }
+    public static DoubleAnimation CreateAnimation(double toValue, double milliseconds = 200)
+    {
+        return new(toValue, new Duration(TimeSpan.FromMilliseconds(milliseconds)))
+        {
+            EasingFunction = new PowerEase { EasingMode = EasingMode.EaseInOut }
+        };
+    }
+
+}