Xamarin.Forms by Microsoft

<PackageReference Include="Xamarin.Forms" Version="4.3.0.991221" />

 StyleSheet

public sealed class StyleSheet : IStyle
Class for loading style sheets from strings, assembly resources, and text readers.
public static StyleSheet FromAssemblyResource(Assembly assembly, string resourceId, IXmlLineInfo lineInfo = null)

Returns the specified style sheet.

public static StyleSheet FromReader(TextReader reader)

Returns a style sheet by reading style data from the reader.

public static StyleSheet FromResource(string resourcePath, Assembly assembly, IXmlLineInfo lineInfo = null)

public static StyleSheet FromString(string stylesheet)

Creates and returns a style sheet from a string that contains a text representation of a style sheet.