use style

PacticeSolution/HowToUseStyle/App.xaml

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+<Application x:Class="HowToUseStyle.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:HowToUseStyle"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

PacticeSolution/HowToUseStyle/App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace HowToUseStyle
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

PacticeSolution/HowToUseStyle/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

PacticeSolution/HowToUseStyle/HowToUseStyle.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>

PacticeSolution/HowToUseStyle/MainWindow.xaml

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+<Window x:Class="HowToUseStyle.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:HowToUseStyle"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Window.Resources>
+        <!--Style Inheritance-->
+        <Style TargetType="{x:Type Button}" x:Key="styBoldButton">
+            <Setter Property="FontWeight" Value="ExtraBold"/>
+        </Style>
+        <Style TargetType="Button" BasedOn="{StaticResource styBoldButton}">
+            <Setter Property="Background" Value="Tomato"/>
+            <Setter Property="FontSize" Value="30"/>
+        </Style>
+        <Style TargetType="Button" x:Key="rscButton" BasedOn="{StaticResource styBoldButton}">
+            <Setter Property="Background" Value="PaleVioletRed"/>
+        </Style>
+    </Window.Resources>
+    
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition/>
+            <RowDefinition/>
+            <RowDefinition/>
+            <RowDefinition/>
+        </Grid.RowDefinitions>
+
+        <Button Grid.Row="0" Content="This is button"/>
+        <Button Grid.Row="1" Content="This is button" Style="{StaticResource rscButton}"/>
+        <Button Grid.Row="2" Content="Trigger button">
+            <Button.Style>
+                <Style TargetType="Button">
+                    <Style.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter Property="Background" Value="LimeGreen"/>
+                            <Setter Property="Foreground" Value="White"/>
+                        </Trigger>
+                    </Style.Triggers>
+                </Style>
+            </Button.Style>
+        </Button>
+        <StackPanel Grid.Row="3" Orientation="Horizontal">
+            <CheckBox x:Name="cbTrigger"/>
+            <Button Content="Check the check box">
+                <Button.Style>
+                    <Style TargetType="Button">
+                        <Style.Triggers>
+                            <DataTrigger Binding="{Binding ElementName=cbTrigger, Path=IsChecked}" Value="True">
+                                <Setter Property="Foreground" Value="Red"/>
+                                <Setter Property="FontWeight" Value="ExtraBold"/>
+                            </DataTrigger>
+                        </Style.Triggers>
+                    </Style>
+                </Button.Style>
+            </Button>
+        </StackPanel>
+    </Grid>
+</Window>

PacticeSolution/HowToUseStyle/MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace HowToUseStyle
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}