Csharp/C Sharp by API/System.Collections.Generic/Dictionary

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Dictionary.Keys

<source lang="csharp">

using System; using System.Collections.Generic;

class MainClass {

 public static void Main() {  
   Dictionary<string, double> dict = new Dictionary<string, double>();  
     
   // Add elements to the collection. 
   dict.Add("A", 7);  
   dict.Add("B", 5);  
   dict.Add("C", 4);  
   dict.Add("D", 9);  
 
   // Get a collection of the keys (names). 
   ICollection<string> c = dict.Keys;  
 
   foreach(string str in c)  
     Console.WriteLine("{0}, Salary: {1:C}", str, dict[str]);  
 }  

}

 </source>


new Dictionary<T, T>()

<source lang="csharp">

using System; using System.Collections.Generic; using System.Linq; static class TestDictionary {

   static void Main() {
       Dictionary<int, string> frenchNumbers;
       frenchNumbers = new Dictionary<int, string>();
       frenchNumbers.Add(0, "zero");
       frenchNumbers.Add(1, "one");
       frenchNumbers.Add(2, "two");
       frenchNumbers.Add(3, "three");
       frenchNumbers.Add(4, "four");
       var evenFrenchNumbers =
         from entry in frenchNumbers
         where (entry.Key % 2) == 0
         select entry.Value;
   }

}


 </source>