C#

[DllImport("Kernel32.dll", CharSet=CharSet.Unicode,ExactSpelling=true)]<br />

[DllImport("kernel32.dll", CharSet=CharSet.Auto)]
[return: MarshalAs(UnmanagedType.U4)]
static extern int GetProfileString(string appName, string keyName, string default,
  [Out] string returnedstring, [MarshalAs(UnmanagedType.U4)] int size);

using System;
using System.Management;
using System.Reflection;
 
[assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyKeyName("dev")]
 
class Printers
{
  static void Main(string[] args)
  {
    EnumeratePrinters(args.Length > 0 ? args[0] : null);
  }
 
  static void EnumeratePrinters(string defaultName)
  {
    ManagementObject defaultPrinter = null;
    ManagementObjectSearcher searcher = new ManagementObjectSearcher(
      "select * from Win32_Printer");
    foreach (ManagementObject printer in searcher.Get())
    {
      string name = printer["Name"].ToString();
      Console.WriteLine("Printer: " + name);
      if (defaultName != null &&
        string.Compare(name, defaultName, true) == 0)
        defaultPrinter = printer;
    }
 
    if (defaultPrinter != null)
    {
      Console.WriteLine("Setting default printer to \"{0}\"",
        defaultPrinter["Name"]);
      defaultPrinter.InvokeMethod("SetDefaultPrinter", null);
    }      
  }
}

            DateTime time1 = DateTime.Now;<br />
            DateTime time2 = DateTime.Now.Add(new TimeSpan(0,0,59,0,0));<br />
<br />
            TimeSpan span = time2.Subtract(time1);<br />
            int minutes = span.Minutes;

DateTime dt1 = DateTime.Now;
DateTime dt2 = dt1.AddDays(30);
TimeSpan span = dt2 - dt1;

DateTime a = new DateTime(2004, 11, 15, 12, 30, 15, 22);
DateTime b = new DateTime(2004, 11, 15, 13, 33, 15, 22);
double minutes = ((TimeSpan) (b - a)).TotalMinutes;