C#

public class Person
{
  string name, DateTime birthday;
  public string Name
  {
    get { return name; }
    set { if (value == null) throw new ArgumentNullException(); name = value; }
  }
  public DateTime Birthday
  {
    get { return birthday; }
    set { birthday = value; }
  }
}

public class pair<T1, T2>
{
    public T1 First
    {
        get {return this.t1;}
        set {this.t1 = value;}
    }

    public T2 Second
    {
        get { return this.t2; }
        set { this.t2 = value; }
    }

    public pair(T1 type1, T2 type2)
    {
        this.t1 = type1;
        this.t2 = type2;
    }
    private T1 t1;
    private T2 t2;
}
/// Implementation
private void button1_Click(object sender, EventArgs e)
{
    pair<int, int> i = new pair<int, int>(5, 10);
    MessageBox.Show(string.Format("First value:{0}, second value:{1}",
        i.First.ToString(), i.Second.ToString()));
}

<?xml version="1.0">
<?mso-application progid="Word.Document"?>

The System.Data.SqlTypes namespace provides classes for native data types within SQL Server. These classes provide a safer, faster alternative to other data types. Using the classes in this namespace helps prevent type conversion errors caused in situations where loss of precision could occur. Because other data types are converted to and from SqlTypes behind the scenes, explicitly creating and using objects within this namespace results in faster code as well.

using System;
using System.Management;
 
class Test
{
  static void Main()
  {
    ManagementObjectSearcher searcher = new ManagementObjectSearcher(
      "select * from Win32_NetworkAdapter");
    foreach (ManagementObject nic in searcher.Get())
    {
      Console.WriteLine("Name: " + nic["Name"]);
      Console.WriteLine("Network connection ID: " +
        nic["NetConnectionID"]);
      Console.WriteLine("Status: " + nic["NetConnectionStatus"]);
      Console.WriteLine();
    }
  }
}