1) in web.config, set encoding to utf-8
2) in sql server, set field type to nchar, nvarchar or ntext
3) in the application data access layer, if using stored procedure, just set the input/output parameter to nchar, nvarchar or ntext; if using plain sql, use sth like "insert into employee_table(names, age) values(N'myname', 22)"
sql server will change uft-8 to ucs-2 and vise versa automatically.