How to serialize SqlParameter ?

hi, I would like to ask how to serialize class with members like
SqlParameter. I try to use BinaryFormatter.

[Serializable]
public class Example_Class
{

public SqlParameter sqlParam;

public Example_Class()
{
sqlParam = new SqlParameter("@Data", SqlDbType.VarChar);
}
}

class App
{
[STAThread]
static void Main()
{
FileStream fs = new FileStream("DataFile.dat", FileMode.Create);

try
{
// Construct a BinaryFormatter and use it
// to serialize the data to the stream.
BinaryFormatter formatter = new

Example_Class dod = new Example_Class();
// Serialize the array elements.
formatter.Serialize(fs, dod);

// Deserialize the array elements.
fs.Position = 0;
Example_Class dod2 = (Example_Class) formatter.Deserialize(fs);

Console.WriteLine("Do both class refer to the same object? "
+ (dod.sqlParam == dod2.sqlParam));
Console.ReadLine();

}
catch (SerializationException e)
{
Console.WriteLine("Failed to serialize. Reason: " + e.Message); Console.ReadLine();
throw;
}
finally
{
fs.Close();
}
}

and error is :

"The type System.Data.SqlClient.SqlParameter in Assembly System.Data,
Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 is
not marked as serializable."

but I know that's possible. What I do wrong ?
How do I have to implement this?

Thanks,
Marcin