C # region

# Region is a C # Preprocessor command.
# Region is a multipart preprocessing command. It is mainly used to partition editor Code and is automatically deleted during compilation.
# Region allows you to specify a code block that can be expanded or collapsed when you use the outline display function of the Visual Studio code editor. For example:

# Region MyClass definition
Public class MyClass
{
Static void Main ()
{
}
}
# Endregion

Note: # The region block must be terminated with the # endregion command.
# Region blocks cannot overlap with # if blocks. However, you can nest the # region block in the # if block or the # if block in the # region block.