I have a custom control which I have dropped onto a form in Visual Studio 2010 and c# winforms.

When I drop the control on the form the properties are automatically populated in the From1.Designer.cs file. I want to stop a specific property from appearing in the file. I have already marked it as [Browsable(false)] but this is not enough to stop VS from interfering with my property. Is there an attribute to the VS to ignore the property?

Use this if you want that property to be serialized:

[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]

Instead if you want to stop the property to be serialized if it has its default value you can do what @HandPassant pointed out in the comment and apply the DefaultValueAttribute (it'll be serialized only if the value is different from the default you specified).