In moving to Beta 2, the following changes were made: 1. All occurrences of System.WinForms were changed to System.Windows.Forms. 2. Removed three occurrences of: using System.Core: This namespace no longer exists. 3. All occurrences of code like: iMainMenuBar.MenuItems.All = new System.Windows.Forms.MenuItem[2] {this.iFileMenu, this.iOperationsMenu}; has to be changed to: iMainMenuBar.MenuItems.Add(this.iFileMenu); iMainMenuBar.MenuItems.Add(this.iOperationsMenu); 4. All occurrences of code like: iHeightLabel.TextAlign = System.Windows.Forms.HorizontalAlignment.Right; has to be changed to: iHeightLabel.TextAlign = System.Drawing.ContentAlignment.MiddleRight;