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What is the Keys property of Hashtable class in C#?
Gets an ICollection containing the keys in the Hashtable. It displays all the keys in the collection. In the below code, to get all the keys we have used a loop to loop through the collection.
foreach (int k in h.Keys) { Console.WriteLine(k); }
The above displays all the keys as shown in the following code −
Example
using System; using System.Collections; class Program { static void Main() { Hashtable h = new Hashtable(); h.Add(1, "India"); h.Add(2, "US"); h.Add(3, "UK"); h.Add(4, "Australia"); h.Add(5, "Netherland"); foreach (int k in h.Keys) { Console.WriteLine(k); } } }
Output
5 4 3 2 1
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