Perfomace Issue

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I'm developing an application using Entity Framework but instead declare each entity to save in each form I'm using dynamic variable in form class, is there a perfomance issue, coding like this and is there a better solution ?

dynamic ocurr = bs_active.Current;
try {ocurr.USERID_CR = GlobalAppVariable.cUserLogin;}catch(Exception){}
try {ocurr.DT_CR = DateTime.Now;}catch(Exception){}

bs_active is binding souce with the datasource is objectentity each table/entity have fields USERID_CR dan DT_CR

any help/comment please ?

thanks
Sen