[API Suggestion] Improve MessageBox in WinForms dotnet Core

### Background and motivation

Improving MessageBox is something every developer wants, so they all resort to creating an alternative interface for it. You can find many examples on Github. This is because they cannot localize it or change its appearance, so this new API solves this problem. 


![Untitledllll](https://github.com/user-attachments/assets/e3b2df22-ab02-4e4f-8f85-64b9f15d789b)



![Untitledlast](https://github.com/user-attachments/assets/4c90aa9e-b31d-4910-84f0-6ac7c9a7ca1e)


### API Proposal

```csharp
namespace System.Windows.Forms;

public class MessageBox
{
  /// <summary>
 ///  Type of <see cref="Resources"/> that used to localize Buttons in <see cref="System.Windows.Forms.MessageBox"/>.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static Type? ResourceType { get; set; }
 /// <summary>
 ///  The foreground color of the  <see cref="System.Windows.Forms.MessageBox"/>.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static Color ForeColor { get; set; } = SystemColors.ControlText;
 /// <summary>
 ///  The background color of the  <see cref="System.Windows.Forms.MessageBox"/>.
 /// </summary>

 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static Color BackColor { get; set; } = SystemColors.Window;
 /// <summary>
 ///  The background color of the Footer in <see cref="System.Windows.Forms.MessageBox"/>.
 /// </summary>

 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static Color FooterBackColor { get; set; } = SystemColors.Control;

    /// <summary>
    ///  Sets or gets the MessageBox BorderRadius.
    /// </summary>

    [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
    public MessageBoxCornerPreference MessageBoxBorderRadius{ get;set;}
    /// <summary>
    ///  Sets or gets the MessageBox's border color.
    /// </summary>
   
    public Color MessageBoxBorderColor{ get;set;}
    /// <summary>
    ///  Sets or gets the MessageBox's title bar back color (caption back color).
    /// </summary>
    [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
    public Color MessageBoxCaptionColor{ get;set;}

    /// <summary>
    ///  Sets or gets the MessageBox's title bar text color.
    /// </summary>
    [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
    public Color MessageBoxCaptionTextColor{ get;set;}
}
```


### API Usage

```csharp

MessageBox.ResourceType = typeof(Properties.Resources)
MessageBox.ForeColor = SystemColors.ControlText;
MessageBox.BackColor = SystemColors.Window;
MessageBox.FooterBackColor = SystemColors.Control;

 MessageBox.Show("MessageBox with Custom Icon", "Custom Icon", MessageBoxButtons.YesNo, SystemIcons.GetStockIcon(StockIconId.Users, StockIconOptions.ShellIconSize));

```


### Alternative Designs

```csharp
 /// <summary>
 ///  Displays a message box with specified text, caption, style, and custom Icon. with Help Button.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     bool displayHelpButton)
 {
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, displayHelpButton);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath)
 {
     HelpInfo hpi = new(helpFilePath);
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path, and custom Icon. for a IWin32Window.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     IWin32Window? owner,
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath)
 {
     HelpInfo hpi = new(helpFilePath);
     s_customIcon = icon;
     return ShowCore(owner, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path, keyword, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     string keyword)
 {
     HelpInfo hpi = new(helpFilePath, keyword);
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path, keyword, and custom Icon for a IWin32Window.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     IWin32Window? owner,
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     string keyword)
 {
     HelpInfo hpi = new(helpFilePath, keyword);
     s_customIcon = icon;
     return ShowCore(owner, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path HelpNavigator, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     HelpNavigator navigator)
 {
     HelpInfo hpi = new(helpFilePath, navigator);
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path HelpNavigator, and custom Icon for IWin32Window.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     IWin32Window? owner,
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     HelpNavigator navigator)
 {
     HelpInfo hpi = new(helpFilePath, navigator);
     s_customIcon = icon;
     return ShowCore(owner, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path ,HelpNavigator,object and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     HelpNavigator navigator,
     object? param)
 {
     HelpInfo hpi = new(helpFilePath, navigator, param);
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, Help file Path ,HelpNavigator, object and custom Icon for a IWin32Window.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     IWin32Window? owner,
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options,
     string helpFilePath,
     HelpNavigator navigator,
     object? param)
 {
     HelpInfo hpi = new(helpFilePath, navigator, param);
     s_customIcon = icon;
     return ShowCore(owner, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, hpi);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton,
     MessageBoxOptions options)
 {
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, options, false);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
     string? text,
     string? caption,
     MessageBoxButtons buttons,
     Icon icon,
     MessageBoxDefaultButton defaultButton)
 {
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, defaultButton, 0, false);
 }

 /// <summary>
 ///  Displays a message box with specified text, caption, style, and custom Icon.
 /// </summary>
 [Experimental(DiagnosticIDs.ExperimentalMessageBox, UrlFormat = DiagnosticIDs.UrlFormat)]
 public static DialogResult Show(
   string? text,
   string? caption,
   MessageBoxButtons buttons,
   Icon icon)
 {
     s_customIcon = icon;
     return ShowCore(null, text, caption, buttons, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1, 0, false);
 }
```

### Risks

_No response_

### Will this feature affect UI controls?

Will VS Designer need to support the feature? no
Will this feature need to be localized or be localizable? yes

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[API Suggestion] Improve MessageBox in WinForms dotnet Core #12044

Background and motivation

API Proposal

API Usage

Alternative Designs

Risks

Will this feature affect UI controls?

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

[API Suggestion] Improve MessageBox in WinForms dotnet Core #12044

Description

Background and motivation

API Proposal

API Usage

Alternative Designs

Risks

Will this feature affect UI controls?

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions