What does DataReader'Read() method do?

Answer:

Datareader Read() method reads records one-by-one in a forward manner only.
As name suggests Read means reading records from database.
If records found in DB,then Read method returns true otherwise returns false;

if(dr.Read())

{

   if(!isdbnull(dr["employee_name"]) employee_name = Convert.toString(dr["employee_name"]);

}

Here dr is our SqldataReader Object.