* [C#] add union constructor utility.
* add union utility test.
* std::tolower -> CharToLower
* use std::transform instead
* rebase to master. and regenerate test code
* [C#] support Object API
* fix sign-compare
* fix indent
* add new line before for loop.
* using auto whenever possible
* reduce the amout of blank lines.
* wip: support vectors of union
* done: support unions of vectors
* set C# version to 4.0
* remove null propagation operator
* remove auto property initializer
* remove expression-bodied method
* remove pattern matching
* add Example2 to NetTest.sh
* separate JavaUsage.md and CsharpUsage.md from JavaCsharpUsage.md
* add C# Object based API notes.
* support vs2010.
* remove range based for loop.
* remove System.Linq
* fix indent
* CreateSharedString to CreateString
* check shared attribute
* snake case
Some generic C++ and Rust code is not generated when unions use type
aliases because of potential ambiguity. Actually check for this
ambiguity and only disable offending code only if it is found.
