If you are working on Silverlight and/or WPF project and using Telerik RadControls library, you might be aware of RadDiagram and RadDiagramToolbox. When you add gallery items in RadDiagramToolbox, by default it comes in three columns.
In some business scenario, you might want to increase or decrease the no. of columns in the RadDiagramToolbox. This small blog post will help you in this.