Syntax support 5.6.3

• Improve support for sub-class snippets through the website
• Best effort conversion with errors as comments inline
• Tidy up duplicate import/using statements

VB -> C#

• Using statements and array initialization improvements
• Convert select case expressions
• Fix for multi-parameter extension methods
• Convert single line void delegates
• Fix array initialization incorrect conversion bugs
• Convert operator overloads
• Overestimate when a method should be invoked with no parameters
• Remove global namespace in conversion
• Add Imports System.Runtime.InteropServices when converting an out parameter
• Support Erase and Redim Preserve
• Convert select case expressions
• Extend support for converting with blocks

C# -> VB

• Convert C# 7.0 features: "is pattern", throw and declaration expressions
• Convert expression bodies
• Fix to ensure Case Else always comes last in a Select statement
• Convert base class constructor call
• Fix convert char from integer cast
• Convert hex literals to hex literals (rather than just integers)
• Fix to avoid using "_" as a parameter name
• Fix for loop variable missing declaration and initialization
• Convert declare to extern
• Fix to improve accuracy of adding AddressOf
• Convert block syntax
• Convert empty statement
• Fix to avoid single line if-else statement's conversion causing compilation error
• Fix to avoid delegate with no parameters throwing NullReferenceException