SQL Data Reader - handling Null column values

Question

I\'m using a SQLdatareader to build POCOs from a database. The code works except when it encounters a null value in the database. For example, if the FirstName column in the

Answer 1

reader.IsDbNull(ColumnIndex) works as many answers says.

And I want to mention if you working with column names, just comparing types may be more comfortable.

if(reader["TeacherImage"].GetType() == typeof(DBNull)) { //logic }