End Google Ads 201810 - BS.net 01 --> Hello Experts!!

I got above error when displaying image in crystal report.....
I am assigning root as Blobfield object and assigning to database field.but it gives error.

My code is:

while (dr.Read())
{
CrystalDecisions.CrystalReports.Engine.BlobFieldObject root;
root = (CrystalDecisions.CrystalReports.Engine.BlobFieldObject)objRpt.ReportDefinition.ReportObjects["Picture2"];
object s = dr["Picture"];
Byte s2 = Convert.ToByte(s);
root=(Byte)s2;
}

i dont knw how to bind dr with object.Suggest me method.......