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

Dictionary.Keys

 
  
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]);  
  }  
}

new Dictionary<T, T>()

  

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;
    }
}