This topic is second in a multi-part walkthrough. Refer to Creating and Setting Up a ThemePack Project for information on setting up the Microsoft® Visual Studio® 2008 project. In this topic, you will create the style group's class file.

1. In the "MyThemePack" project, right click on the DataPresenter folder under ResourceSets. In the pop-up menu, click Add, then click Class.
2. In the Add New Item dialog box, name the class file "DataPresenter_ResourceSets" and click Add.
   Note: We recommend that you name the class file using the following convention: "StyleGroupName_ResourceSets"
3. Change the name of the class (not the class file) from "DataPresenter_ResourceSets" to "DataPresenter." Place the public (Public in Visual Basic) keyword before the class keyword.
4. Change the class' namespace from "MyThemePack.ResourceSets.DataPresenter" to "MyThemePack.ResourceSets.OrangePeel."
5. Before you start writing any code, you should place using/Imports directives at the top of your class file so you don't need to always type out a member's fully qualified name.

   In Visual Basic:

   Imports System.ComponentModel
   Imports System.Reflection
   Imports Infragistics.Windows
   Imports Infragistics.Windows.Themes
   

   In C#:

   using System.ComponentModel;
   using System.Reflection;
   using Infragistics.Windows;
   using Infragistics.Windows.Themes;
   

   
   
6. The DataPresenter class derives from DataPresenterResourceSet. The ResourceSet that you derive from depends upon the style group (i.e., if you were creating the ResourceSet for the Editors, you would derive from EditorsResourceSet).

   In Visual Basic:

   Public Class DataPresenter
   	Inherits DataPresenterResourceSet(Of DataPresenter.Locator)
   	...
   End Class
   

   In C#:

   public class DataPresenter : DataPresenterResourceSet<DataPresenter.Locator> 
   {
   	... 
   }

7. Create a static variable that is an instance of the DataPresenter class and provide a static method that accesses the static instance. This makes sure that there is only one instance of this style's DataPresenterResourceSet at all times.

   In Visual Basic:

   ...
   	Private Shared g_Instance As DataPresenter
   
   	Public Shared ReadOnly Property Instance() As DataPresenter
   		Get
   			If g_Instance Is Nothing Then
   				g_Instance = New DataPresenter()
   			End If
   			Return g_Instance
   		End Get
   	End Property
   ...
   

   In C#:

   ...
   	private static DataPresenter g_Instance;
   
   	public static DataPresenter Instance
   	{
   		get
   		{
   			if (g_Instance == null)
   				g_Instance = new DataPresenter();
   			return g_Instance;
   		}
   }
   ...
   

   
   
8. A style group's class file must contain a Locator class. The Locator class derives from ResourceSetLocator and defines key properties such as:
   • access to the Assembly containing the resource set
   • the Theme or name of the style
   • the Grouping, which is specific to the style group
   • the ResourcePath to the embedded ResourceDictionary for the style group within the assembly

   In Visual Basic:

   ...
   	Public Class Locator
   		Inherits ResourceSetLocator
   		Public Overrides ReadOnly Property [Assembly]() As [Assembly]
   			Get
   				Return Me.GetType().Assembly
   			End Get
   		End Property
   
   		Public Overrides ReadOnly Property Theme() As String
   			Get
   				Return "OrangePeel"
   			End Get
   		End Property
   
   		Public Overrides ReadOnly Property Grouping() As String
   			Get
   				Return DataPresenterGeneric.Instance.Grouping
   			End Get
   		End Property
   
   		Public Overrides ReadOnly Property ResourcePath() As String
   			Get
   				Return "ResourceSets\DataPresenter\DataPresenter.xaml"
   			End Get
   		End Property
   	End Class
   ...
   

   In C#:

   ...
   	[EditorBrowsable(EditorBrowsableState.Never)]
   	public class Locator : ResourceSetLocator
   	{
   		public override Assembly Assembly { get { return this.GetType().Assembly; } }
   		public override string Theme { get { return "OrangePeel"; } }
   		public override string Grouping { get { return DataPresenterGeneric.Instance.Grouping; } }
   		public override string ResourcePath { get { return @"ResourceSets\DataPresenter\DataPresenter.xaml"; } }
   	}
   ...
   

   
   

The file the ResourcePath is set to is created in the Creating a Style Group's ResourceDictionary Files.