C#

namespace ConsoleApplication1
{
    public class MyClass<G>
    {
        private G Val;

        public MyClass(string initStr)
        {
            if (initStr == "bad init string")
                throw new ApplicationException("You can't do that!");
            Val = default(G);
        }

        public MyClass(G initVal)
        {
            Val = initVal;
        }
    }
        
    class Program
    {
        static void Main(string[] args)
        {
            MyClass<int> example1 = new MyClass<int>("test"); // use the first constructor
            MyClass<int> example2 = new MyClass<int>(1);      // use the second constructor

            MyClass<string> example3 = new MyClass<string>("what happens here?"); // I want the second constructor
        }
    }
}

public MyClass(G initVal, bool dummy)

MyClass<string> example3 = new MyClass<string>("what happens here?", true);

DataTable dt = new DataTable("Subscribers");
dt.Columns.Add("ID");
dt.Columns.Add("Email");
dt.Columns.Add("signup");
dt.Columns.Add("recent");
dt.Columns.Add("Amount");
dt.Columns.Add("Status");
dt.ReadXml(Application.StartupPath + @"\subscribers.xml");
dataGridView1.DataSource = dt;
dataGridView1.Refresh();