While converting text to datetime I got error..The code is given below...
 
bjJobBL.JobDate =Convert.ToDateTime("txtDate.Text");
 
 Here the jobdate is declared in the class  as
 private DateTime? m_JobDate; 
Its properties are like this... 
 
public DateTime? JobDate
        {
            get
            {
                return m_JobDate;
            }
            set
            {
                m_JobDate = value;
            }
        }