#Region Directive
Visual Studio 2012
Collapses and hides sections of code in Visual Basic files.
#Region "identifier_string" #End Region
Use the #Region directive to specify a block of code to expand or collapse when using the outlining feature of the Visual Studio Code Editor. #Region statements support block semantics (such as #If...#End If), meaning that the start and end must be in the same code block. You can place, or nest, regions within other regions to group similar regions together.