How to Check Date Column in Sql Using C#

com.CommandText = "insert into Persons_info(perId, latinName, gender, dob, pob, phone, passport, curAdd, status) values (@perId, @latinName, @gender, @dob, @pob, @phone, @passport, @curAdd, @status)"

com.Parameters.Add(new SqlParameter("@perId", txtId.Text));
com.Parameters.Add(new SqlParameter("@latinName", txtLatinName.Text));
com.Parameters.Add(new SqlParameter("@gender", cbGender.Text));
com.Parameters.Add(new SqlParameter("@dob", dTPdob.Text));
com.Parameters.Add(new SqlParameter("@pob", txtPob.Text));
com.Parameters.Add(new SqlParameter("@phone", txtPhone.Text));
com.Parameters.Add(new SqlParameter("@passport", txtPassport.Text));
com.Parameters.Add(new SqlParameter("@curAdd", txtCurAdd.Text));
com.Parameters.Add(new SqlParameter("@status", cbStatus.Text));