how to add new stored procedure to existing .edmx file

how to add new stored procedure to existing .edmx file

Hi,

im working on entity framework..i need to add new stored procedure to existing edmx file implementing existing functionalities...i added new stored procedure in this manner Model Browser-->Update Model from dataBase-->checked requared sp-->ok 

everything is ok ,complextype code also generated in MarketSharetool.Designer.cs file but,the main problem is when ever im writting code in 

mainpage.xaml.cs file for retrieving query ,that is not enabled means related sp code is not generating in web.g.cs file.....can you please tell me is there any possible way to add new sp to existing edmx file or need write code in any file....try to give possible reply ASAP..

Thanks

Shukreya.

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