In the Solution Explorer, right-click on References and choose Add Reference.
Choose the .NET tab.
Select System.Windows.Forms and click OK. You should now see it listed under References in the Solution Explorer.
Next, add references to the core ImageGear for .NET Assemblies required for this project and the assembly encapsulating some of the more commonly used Formats.
In the Solution Explorer, right-click on References and choose Add Reference.
Choose the Browse tab.
Navigate to the "ImageGear for .NET v21\Bin" directory and select the following:
ImageGear21.Core.dll
ImageGear21.Formats.Common.dll
ImageGear21.Presentation.dll
ImageGear21.Windows.Controls
ImageGear21.Windows.Forms
ImageGear21.Wpf.dll
Click OK.
You should now have the assemblies listed under References in the Solution Explorer.