Properties related C#

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C#

SQL

I need to send the Data to Email as well as SMS and now what i want is to circulate the values to every class
i have set the properties like this
namespace AVM_Technologies.MailClient
{
public class MailClient
{

public string Course
{
get ;
set;
}
public string Name
{
get ;
set ;

}
public string Email
{
get; set;
}
public string Phone
{
get; set;
}
public string CompleteMail
{
get;set;
}
public string Subject
{ get; set; }
}
}
and when i tried to assign them value in e.g in default page like this
MailClient.MailClient MailClient = new MailClient.MailClient();
MailClient.course = DropDownList1.SelectedItem.Text;
MailClient.name = reservation_Name.Text;
MailClient.Email = reservation_Email.Text;
MailClient.Phone = reservation_phone.Text;
// also what i need to do is insert data in db from different class so now im doing it like this I have sepreate class for insertion like below
public class UserDataInsertion
{
MailClient MailClient = new MailClient();
public void MailDataSqlInsertion()
{
// Insertion of MailData to DataBase
string Connectionstring = ConfigurationManager.ConnectionStrings["DataConnect"].ConnectionString;
int Eval;
try
{
using (SqlConnection con = new SqlConnection(Connectionstring))
{
con.Open();
String CmdText = "insert into dbo.MailTable_Data(Name,Course,Email,Phone,CompleteMail) Values('" + MailClient.Name + "','" + MailClient.Course + "','" + MailClient.Email + "','" + MailClient.phone + "','" + MailClient.CompleteMail + "'";
SqlCommand SqlCmd = new SqlCommand(CmdText, con);
SqlCmd.ExecuteNonQuery();
con.Close();
}
}
catch
{



}
}
}
am accessing the MailCientData in MailDataSqlInsertion() method but properties are empty or null please breif me about this ... thanks in advance ..

What I have tried:

I have made object to access the properties that im sending in insert command to store data but its null can you provide KT about it??