Dictionary remove by value
C# Code:
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class Program { static void Main(string[] args) { //initialize a dictionary with keys and values. Dictionary<int, string> birds = new Dictionary<int, string>() { {1,"Indian Vulture"}, {2,"Barred Fruiteater"}, {3,"Indian Black Eagle"}, {4,"Indian Pitta"}, {5,"Acadian Flycatcher"} }; Console.WriteLine( "dictionary keys and values.........."); foreach (KeyValuePair<int, string> pair in birds) { Console.WriteLine(pair.Key + " ........ " + pair.Value); } //get keys which value starts with [Indian] int[] keysToDelete = birds.Where(x => x.Value.StartsWith("Indian")).Select(x => x.Key).ToArray(); Console.WriteLine("\nremoving elements from dictionary which value starts with [Indian]"); foreach (int key in keysToDelete) { birds.Remove(key); Console.WriteLine("key [" + key + "] removed from dictionary"); } Console.WriteLine("\nelemetns removed which value starts with [Indian].........."); Console.WriteLine("\ndictionary elements after remove.........."); foreach (KeyValuePair<int, string> pair in birds) { Console.WriteLine(pair.Key + " ........ " + pair.Value); } Console.ReadLine(); } } |
Output:
How to remove an item from Dictionary by value in C#
