Try like this.
try
{
int choice = int.TryParse(Console.ReadLine());
switch (choice)
{
case 1:
Console.WriteLine("\n");
conn.InsertData();
Console.WriteLine("\n");
conn.GetData();
break;
case 2:
break;
default:
Console.WriteLine("Other number");
break;
}
}
catch(Exception ex)
{
Console.WriteLine("Message"+ex.Message.ToString());
}