- using static System.Console; 
- using System.Collections.Generic;					 
- public class Program { 
- 	public static void Main() { 
- 		ImprimeValores(null); 
- 		ImprimeValores(new List<int>()); 
- 		ImprimeValores(new List<int> { 1, 2, 3 }); 
- 	} 
-     static void ImprimeValores(IList<int> values) { 
-         if (values != null) foreach(int v in values) WriteLine("value:" + v); 
-     } 
- } 
-   
- //https://pt.stackoverflow.com/q/129966/101 
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