c# erros how to solve?

Question

Severity Code Description Project File Line Suppression State

Error CS1061 'object' does not contain a definition for 'DataSource' and no extension method 'DataSource' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) StrockManagment C:\Users\user\Documents\Visual Studio 2015\Projects\StrockManagment\StrockManagment\Brand.cs 66 Active

 

Severity Code Description Project File Line Suppression State

Error CS1061 'object' does not contain a definition for 'DataSource' and no extension method 'DataSource' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) StrockManagment C:\Users\user\Documents\Visual Studio 2015\Projects\StrockManagment\StrockManagment\Supplier.cs 67 Active