Merge pull request #1188 from telerik/new-kb-change-theme-swatch-runtime-dotnet-maui-85776857e3e14c948cf304f236d0ce36

Added new kb article change-theme-swatch-runtime-dotnet-maui

Author: didiyordanova

knowledge-base/change-theme-swatch-runtime-dotnet-maui.md

@@ -0,0 +1,60 @@
+---
+title: Changing Theme Swatch at Runtime in C# Code
+description: Learn how to change the Theme Colors (Swatches) at runtime using C# code.
+type: how-to
+page_title: Modify Theme Swatch Dynamically in .NET MAUI
+meta_title: Modify Theme Swatch Dynamically in .NET MAUI
+slug: change-theme-swatch-runtime-dotnet-maui
+tags: teleriktheme, telerikthemresources, apptheme, customswatch, netmaui
+res_type: kb
+---
+
+## Environment
+
+| Version | Product | Author | 
+| --- | --- | ---- | 
+| 11.0.0 | Telerik UI for .NET MAUI | [Dobrinka Yordanova](https://www.telerik.com/blogs/author/dobrinka-yordanova) | 
+
+## Description
+
+I want to change the Theme Colors (Swatches) at runtime using C# code in a .NET MAUI application.
+
+This knowledge base article also answers the following questions:
+- How to switch theme colors at runtime in .NET MAUI?
+- How to dynamically apply theme swatches using C# in Telerik UI for .NET MAUI?
+
+## Solution
+
+To change the theme swatch dynamically, set the `TelerikThemeResources.AppTheme` to the desired pre-defined theme.
+
+Below is an example, showing how to switch from the `TelerikPurple` theme to the `TelerikTurquoise` theme and merge a custom swatch defined in a `CustomTelerikSwatch.xaml` file.
+
+1. Apply the custom swatch at runtime:
+
+```csharp
+public partial class App : Application
+    {
+        public App()
+        {
+            InitializeComponent();
+            TelerikThemeResources.AppTheme = TelerikTheme.TelerikPurple;
+        }
+
+        protected override Window CreateWindow(IActivationState? activationState)
+        {
+            return new Window(new AppShell());
+        }
+    }
+```
+
+2. Invoke the method to change the theme and swatch during runtime.
+
+```csharp
+TelerikThemeResources.AppTheme = TelerikTheme.TelerikTurquoise;
+TelerikThemeResources.Current.MergedDictionaries.Add(new CustomTelerikSwatch());
+```
+
+## See Also
+
+- [Styling and Themes - Customize the Theme Colors (Swatches)](https://docs.telerik.com/devtools/maui/styling-and-themes/customize-the-theme#customizing-the-theme-colors-swatches)
+- [Change Telerik Theme at Runtime](https://docs.telerik.com/devtools/maui/knowledge-base/change-telerik-theme-runtime)