C#

<br />
<br />
    string server = "Server=http://www.somepage.org.nz;Database=somedatabase;Uid=myusername;Pwd=mypassword";<br />
    MySqlConnection con = null;<br />
    try<br />
    {<br />
        con = new MySqlConnection(server);<br />
        con.Open();<br />
        this.label1.Text = con.State.ToString();<br />
    }<br />
    catch (Exception ex)<br />
    {<br />
        this.label1.Text = ex.Message;<br />
    }<br />

ServiceClient myService = new ServiceClient();
SomeDataType[] result = myService.GetSomeData(...arguments...);
myService.Close();

ServiceClient myService = new ServiceClient();
SomeDataType[] result;

try
{
    result = myService.GetSomeData();

    if (result == null)
    {
        throw new ArgumentNullException("result", "Service method GetSomeData() returned null.");
    }
}
finally
{
    myService.Close();
}
return result;

public sealed class Singleton
{
static readonly Singleton instance=new Singleton();

// Explicit static constructor to tell C# compiler
// not to mark type as beforefieldinit
static Singleton()
{
}

Singleton()
{
}

public static Singleton Instance
{
get
{
return instance;
}
}
}