Install-Package Syncfusion.SfSmartComponents.WPF

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
        x:Class="YourApp.MainWindow">
    <Grid>
        <syncfusion:SfSmartTextEditor 
            x:Name="smartTextEditor"
            Placeholder="Type your response..."
            UserRole="Customer support agent responding to inquiries">
            <syncfusion:SfSmartTextEditor.UserPhrases>
                <x:String>Thank you for reaching out.</x:String>
                <x:String>We'll investigate and get back to you shortly.</x:String>
            </syncfusion:SfSmartTextEditor.UserPhrases>
        </syncfusion:SfSmartTextEditor>
    </Grid>
</Window>

using Azure.AI.OpenAI;
using Microsoft.Extensions.AI;
using Microsoft.Extensions.DependencyInjection;
using Syncfusion.UI.Xaml.SmartComponents;
using System.ClientModel;
using System.Windows;

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        
        // Configure Azure OpenAI
        string azureApiKey = "<YOUR-API-KEY>";
        Uri azureEndpoint = new Uri("<YOUR-ENDPOINT>");
        string deploymentName = "<YOUR-DEPLOYMENT>";

        AzureOpenAIClient azureClient = new AzureOpenAIClient(
            azureEndpoint, 
            new ApiKeyCredential(azureApiKey)
        );
        IChatClient chatClient = azureClient
            .GetChatClient(deploymentName)
            .AsIChatClient();
        
        SyncfusionAIExtension.Services.AddSingleton<IChatClient>(chatClient);
        SyncfusionAIExtension.ConfigureSyncfusionAIServices();
    }
}

<syncfusion:SfSmartTextEditor
    Placeholder="Write your response..."
    UserRole="Technical support engineer helping customers with product issues"
    MaxLength="2000"
    SuggestionDisplayMode="Inline">
    <syncfusion:SfSmartTextEditor.UserPhrases>
        <x:String>Thanks for contacting Syncfusion support.</x:String>
        <x:String>Could you please share a reproducible sample?</x:String>
        <x:String>We've logged this as a bug and will update you soon.</x:String>
        <x:String>Let us know if you need further assistance.</x:String>
    </syncfusion:SfSmartTextEditor.UserPhrases>
</syncfusion:SfSmartTextEditor>

<syncfusion:SfSmartTextEditor
    Placeholder="Compose your email..."
    UserRole="Professional email author"
    SuggestionDisplayMode="Popup"
    MaxLength="5000">
    <syncfusion:SfSmartTextEditor.Style>
        <Style TargetType="{x:Type syncfusion:SfSmartTextEditor}">
            <Setter Property="FontSize" Value="14"/>
            <Setter Property="Foreground" Value="#333333"/>
            <Setter Property="FontFamily" Value="Segoe UI"/>
        </Style>
    </syncfusion:SfSmartTextEditor.Style>
    <syncfusion:SfSmartTextEditor.SuggestionPopupStyle>
        <Style TargetType="syncfusion:SuggestionPopup">
            <Setter Property="Background" Value="#0078D4"/>
            <Setter Property="Foreground" Value="White"/>
        </Style>
    </syncfusion:SfSmartTextEditor.SuggestionPopupStyle>
</syncfusion:SfSmartTextEditor>

<syncfusion:SfSmartTextEditor
    x:Name="smartTextEditor"
    TextChangedCommand="{Binding TextChangedCommand}"
    Placeholder="Start typing..."/>

public class EditorViewModel : INotifyPropertyChanged
{
    public ICommand TextChangedCommand { get; }

    public EditorViewModel()
    {
        TextChangedCommand = new RelayCommand(OnTextChanged);
    }

    private void OnTextChanged()
    {
        // Auto-save, validation, or tracking logic
        Debug.WriteLine("Text changed - triggering auto-save");
    }
}

<syncfusion:SfSmartTextEditor
    Placeholder="Type your message..."
    UserRole="Sales representative responding to leads">
    <syncfusion:SfSmartTextEditor.UserPhrases>
        <x:String>Thank you for your interest in our products.</x:String>
        <x:String>I'd be happy to schedule a demo.</x:String>
        <x:String>Our pricing starts at $99 per month.</x:String>
        <x:String>Let me connect you with our solutions team.</x:String>
        <x:String>Feel free to reach out with any questions.</x:String>
    </syncfusion:SfSmartTextEditor.UserPhrases>
</syncfusion:SfSmartTextEditor>