Nothing against VB, but many (read most) .NET developers love their curly braces and semicolons.
WF 4.5 now supports C# expressions giving you the choice to keep your VB projects or go with C#, all the way, baby!
Learn more about the designer improvements in WF 4.5 here: http://msdn.microsoft.com/en-us/library/hh305677(VS.110).aspx