LINQ

Standard Query Operators

var folders = System.IO.Directory.GetDirectories( 
   @"C:\").Where(d => d.Length > 5).OrderBy(d => d.Length); 
foreach (string folder in folders) 
{ 
   System.Windows.Forms.MessageBox.Show(folder); 
} 

Query Expression Syntax

var folders = 
   from d in System.IO.Directory.GetDirectories(@"C:\") 
   where d.Length > 5 
   orderby d.Length 
   select d; 
foreach (string folder in folders) 
{ 
   System.Windows.Forms.MessageBox.Show(folder); 
}