David,

>I recently upgraded to Mere Mortals 2.1 and Visual Studio 2005. The actual conversion went fairly smooth, however, I had a custom command buttons control that uses mmToolBarButtons. The control works great in Visual Studio 2003/Mere Mortals 1.4, but now in 2005 I am getting an error that reads: 'Type OakLeaf.MM.Main.Windows.Forms.mmToolBarButton' in Assembly 'Mere Mortals Framework Windows Forms 2005, Version=2.0.0.0, Culture=neutral,PublicKeyToken=57ceb69243304587' is not marked as serializable.
>
>I was reading over the documentation to see if any changes were made to the toolbar buttons, and it doesn't appear there have been any. Anyone else experiencing this problem or know of a possible solution I could try?

Actually, Microsoft replace the Toolbars in VS 2003/.NET 1.1 with the new ToolStrip in VS 2005/.NET 2.0. In the What's New for MM .NET 2.0 it discusses changing your custom toolbars to toolstrips. Basically, you should recreate your Toolbar control using the new mmToolStrip instead.

Best Regards,