Optional parameters are not optional in C#

src/Wpf.Ui/ISnackbarService.cs

@@ -22,28 +22,102 @@ public interface ISnackbarService
     /// <summary>
     /// Sets the <see cref="SnackbarPresenter"/>
     /// </summary>
-    /// <param name="contentPresenter"></param>
+    /// <param name="contentPresenter"><see cref="ContentPresenter"/> inside of which the snackbar will be placed. The new <see cref="Snackbar"/> will replace the current <see cref="ContentPresenter.Content"/>.</param>
     void SetSnackbarPresenter(SnackbarPresenter contentPresenter);
 
     /// <summary>
     /// Provides direct access to the <see cref="ContentPresenter"/>
     /// </summary>
-    /// <returns></returns>
+    /// <returns><see cref="Snackbar"/> currently in use.</returns>
     SnackbarPresenter GetSnackbarPresenter();
 
     /// <summary>
     /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
     /// </summary>
-    /// <param name="title"></param>
-    /// <param name="message"></param>
-    /// <param name="appearance"></param>
-    /// <param name="icon"></param>
-    /// <param name="timeout"></param>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    void Show(
+        string title,
+        string message
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="appearance">Display style.</param>
+    void Show(
+        string title,
+        string message,
+        ControlAppearance appearance
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="icon">Additional icon on the left.</param>
+    void Show(
+        string title,
+        string message,
+        IconElement icon
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="timeout">The time after which the snackbar should disappear.</param>
+    void Show(
+        string title,
+        string message,
+        TimeSpan timeout
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="appearance">Display style.</param>
+    /// <param name="timeout">The time after which the snackbar should disappear.</param>
+    void Show(
+        string title,
+        string message,
+        ControlAppearance appearance,
+        TimeSpan timeout
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="icon">Additional icon on the left.</param>
+    /// <param name="timeout">The time after which the snackbar should disappear.</param>
+    void Show(
+        string title,
+        string message,
+        IconElement icon,
+        TimeSpan timeout
+    );
+
+    /// <summary>
+    /// Shows the snackbar. If it is already visible, firstly hides it for a moment, changes its content, and then shows it again.
+    /// </summary>
+    /// <param name="title">Name displayed on top of snackbar.</param>
+    /// <param name="message">Message inside the snackbar.</param>
+    /// <param name="appearance">Display style.</param>
+    /// <param name="icon">Additional icon on the left.</param>
+    /// <param name="timeout">The time after which the snackbar should disappear.</param>
     void Show(
         string title,
         string message,
-        ControlAppearance appearance = ControlAppearance.Secondary,
-        IconElement? icon = null,
-        TimeSpan timeout = default
+        ControlAppearance appearance,
+        IconElement? icon,
+        TimeSpan timeout
     );
 }

src/Wpf.Ui/SnackbarService.cs

@@ -4,7 +4,6 @@
 // All Rights Reserved.
 
 using System;
-using Wpf.Ui.Contracts;
 using Wpf.Ui.Controls;
 
 namespace Wpf.Ui;
@@ -15,6 +14,7 @@ namespace Wpf.Ui;
 public class SnackbarService : ISnackbarService
 {
     private SnackbarPresenter? _presenter;
+
     private Snackbar? _snackbar;
 
     /// <inheritdoc />
@@ -30,31 +30,72 @@ public void SetSnackbarPresenter(SnackbarPresenter contentPresenter)
     public SnackbarPresenter GetSnackbarPresenter()
     {
         if (_presenter is null)
+        {
             throw new ArgumentNullException($"The SnackbarPresenter didn't set previously.");
+        }
 
         return _presenter;
     }
 
+    /// <inheritdoc />
+    public void Show(string title, string message)
+    {
+        Show(title, message, ControlAppearance.Secondary, null, new TimeSpan(2));
+    }
+
+    /// <inheritdoc />
+    public void Show(string title, string message, ControlAppearance appearance)
+    {
+        Show(title, message, appearance, null, new TimeSpan(2));
+    }
+
+    /// <inheritdoc />
+    public void Show(string title, string message, IconElement icon)
+    {
+        Show(title, message, ControlAppearance.Secondary, icon, new TimeSpan(2));
+    }
+
+    /// <inheritdoc />
+    public void Show(string title, string message, TimeSpan timeout)
+    {
+        Show(title, message, ControlAppearance.Secondary, null, timeout);
+    }
+
+    /// <inheritdoc />
+    public void Show(string title, string message, ControlAppearance appearance, TimeSpan timeout)
+    {
+        Show(title, message, appearance, null, timeout);
+    }
+
+    /// <inheritdoc />
+    public void Show(string title, string message, IconElement icon, TimeSpan timeout)
+    {
+        Show(title, message, ControlAppearance.Secondary, icon, timeout);
+    }
+
     /// <inheritdoc />
     public void Show(
         string title,
         string message,
-        ControlAppearance appearance = ControlAppearance.Secondary,
-        IconElement? icon = null,
-        TimeSpan timeout = default
+        ControlAppearance appearance,
+        IconElement? icon,
+        TimeSpan timeout
     )
     {
         if (_presenter is null)
+        {
             throw new ArgumentNullException($"The SnackbarPresenter didn't set previously.");
+        }
 
         _snackbar ??= new Snackbar(_presenter);
 
-        _snackbar.Title = title;
-        _snackbar.Content = message;
-        _snackbar.Appearance = appearance;
-        _snackbar.Icon = icon;
-        _snackbar.Timeout = timeout.TotalSeconds == 0 ? DefaultTimeOut : timeout;
+        _snackbar.SetCurrentValue(Snackbar.TitleProperty, title);
+        _snackbar.SetCurrentValue(System.Windows.Controls.ContentControl.ContentProperty, message);
+        _snackbar.SetCurrentValue(Snackbar.AppearanceProperty, appearance);
+        _snackbar.SetCurrentValue(Snackbar.IconProperty, icon);
+        _snackbar.SetCurrentValue(Snackbar.TimeoutProperty, timeout.TotalSeconds == 0 ? DefaultTimeOut : timeout);
 
         _snackbar.Show(true);
     }
+
 }