1 static double TakeSquareRoot(int x)
 2 {
 3     //return Math.Sqrt(x);
 4     return x   1;
 5 }
 6 
 7 static void Main(string[] args)
 8 {
 9     List<int> integers = new List<int>();
10     integers.Add(1);
11     integers.Add(2);
12     integers.Add(3);
13     integers.Add(4);
14 
15     Converter<int, double> converter = TakeSquareRoot;
16     List<double> doubles;
17     doubles = integers.ConvertAll<double>(converter);
18     foreach (double d in doubles)
19     {
20         Console.WriteLine(d);
21     }
22 
23     Console.WriteLine("OK");
24 
25     Console.ReadKey();
26 }