Rdlc Report Column visibility in Export

I Have One Rdl Report As Par Client Requirement I Want To Hide Some Columns In Exporting Report They Should Display Only Run Time Not In Export

plz help me for Export CSV

I can try all of thing but not working yet

Solution

I Can Find The Solution Of This Situation But Not Working In Export CSV File

1 ) I Install SqlServer R2 So Get One Paramete Like Reander.name Using This Parameter I Can Hide Specific Column Or Row
but It Should Working In PDF And Excel not In Csv File

Is this declaration UB?
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