Kind of CSS for Winforms.

• Selectors by Type, Name and class (using Tag).
• Nested selectors.
• Supports all controls properties:
  • Set via Reflection
  • Set with Constructor
  • Supports KnownColors and HtmlColors
  • Supports Enum properties
• Variables block definition.
• Can include parent theme files.
• Simple registration by windows hook

Button { ... }

#button1 { .... }

this.button1.Tag = "Btn"; // <-- in the code

.Btn { ... }

Panel
{
    Button { ... }
}

Button 
{
    BackColor : Red; // KnownColor
    ForeColor : #67ffff; // HTML
    Font: Arial, 20, Bold; // By font ctor
    FlatAppearance.BorderSize: 2; // sub-property
}

$Variable
{
    SomeColor: Blue;
}

Form 
{
    BackColor : @SomeColor;
}

$Include 
{
    parent1.theme;
    parent2.theme;
}

// Program.cs
var theme = WinformsThemeLoader.Load("sample.theme");
using (ThemeHooker.HookTheme(theme))
{
    Application.Run(new Form1());
}

See the Demo project for full working sample.

• Adapt to WPF and UWP
• Support events (such as OnEnter, OnLeave...)
• Apply selectors by order - by type -> by class -> by name;
• With hooking - make sure to handle controls that were created after the form has been shown.
• Tool for editing the theme file
• Setting images
• Set the cursor icon
• Convertor tool to CSS

Any contribution is welcome!

Theme format inspired by https://github.com/paradoxlost/ux