C#

saurabh001 wrote:

I want to add these 3 lists....

List<string> l1 = new List<string>();
...
List<string> l2 = new List<string>();
...
l2.AddRange(l1)

public class CD 
{
    // constructor code ?
    public CD(?) {?}

    public class CDA 
    {
       // constructor code ?
       public CDA(?) {?}

       public List<double> cda1 {get; set;}
       public List<double> cda2 {get; set;}
       // and so on ...
    }

    public class CDB {}
    public class CDC {}
}
//
public List1<CD> list1 = new List<CD>();
public List2<CD> list2 = new List<CD>();
public List3<CD> list3 = new List<CD>();
//
// some function that fills all the Lists, and inner Lists, and the inner property Lists of Type double, or is a database involved here ? database query result ?
//
// the result ?
public List<CD> SumOfLists = // using Linq ?

try
      {
          client.Send(message);
      }
      catch (SmtpException ex)
      {
         MessageBox.Show(String.Format("Error: {0}", ex.StatusCode));
      }

string RetMsg = string.Empty;
try
{
  client.Send(message);
  RetMsg = "Success";
}
catch (SmtpException ex)
{
  RetMsg = String.Format("Error: {0}", ex.StatusCode);
}

MessageBox.Show(RetMsg);