.NET: Microsoft Technologies based on the .NET software framework. Runtime: An environment required to run apps that aren't compiled to machine language.
Please don't post screenshots, post the code as it instead. And the screenshot seems to be imcomplete, there is something missing at the right site.
Your SQL statement is wrong, at least the SET keyword is missing =>
update user_main set user_password=@par_pass where user_ab = @par_id