Hi Guys:
Recently , I Just start study dhtmlxScheduler ,and want store data to MS-SQL.
When I input Chinese, the value I get from Server is messy code.
I am sure all Html/JS/DB in UTF-8 encoding.
So I try to trace the problem, finally find a BUG in .NET Connector.
Cause Connector not use SQLParameter to build SQLCommand , so need to add prefix [N] for unicode field .
We just need add [N] in CreateUpdateQuery() & CreateInsertQuery() ,
then Recompile it ,that’s it.
Enjoy ~~ 
