If my start date and and date differenc one or more days I have error An unhandled exception of type 'System.NullReferenceException' occurred in System.Drawing.dll if differenc in minutes everythink is ok?
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If my start date and and date differenc one or more days I have error An unhandled exception of type 'System.NullReferenceException' occurred in System.Drawing.dll if differenc in minutes everythink is ok?