C# | SortedDictionary.Remove() Method
This method is used to remove the value with the specified key from the SortedDictionary<TKey, TValue>.
Syntax:
public bool Remove (TKey key);
Return Value: This method returns true if the element is successfully found and removed; otherwise it returns false. This method returns false if key is not found in the SortedDictionary.
Exception: This method will give ArgumentNullException if the key is null.
Below are the programs to illustrate the use of the above-discussed method:
Example 1:
// C# code to remove the entry with // the specified key from the // SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new dictionary of // strings, with string keys. SortedDictionary< string , string > myDict = new SortedDictionary< string , string >(); // Adding key/value pairs in myDict myDict.Add( "Australia" , "Canberra" ); myDict.Add( "Belgium" , "Brussels" ); myDict.Add( "Netherlands" , "Amsterdam" ); myDict.Add( "China" , "Beijing" ); myDict.Add( "Russia" , "Moscow" ); myDict.Add( "India" , "New Delhi" ); // To get count of key/value pairs in myDict Console.WriteLine( "Total key/value pairs" + " in myDict are : " + myDict.Count); // Remove the entry with the specified // key from the Dictionary myDict.Remove( "Russia" ); Console.WriteLine( "After remove operation" ); // To get count of key/value pairs in myDict Console.WriteLine( "Total key/value pairs" + " in myDict are : " + myDict.Count); } } |
Output:
Total key/value pairs in myDict are : 6 After remove operation Total key/value pairs in myDict are : 5
Example 2:
// C# code to remove the entry with // the specified key from the // SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new SortedDictionary // of ints, with int keys. SortedDictionary< int , int > myDict = new SortedDictionary< int , int >(); // Adding key/value pairs in myDict myDict.Add(9, 8); myDict.Add(3, 4); myDict.Add(4, 7); myDict.Add(1, 7); // To get count of key/value pairs in myDict Console.WriteLine( "Total key/value pairs " + "in myDict are : " + myDict.Count); // Remove the entry with the specified // key from the Dictionary myDict.Remove(9); Console.WriteLine( "After remove operation" ); // To get count of key/value pairs in myDict Console.WriteLine( "Total key/value pairs in" + " myDict are : " + myDict.Count); } } |
Output:
Total key/value pairs in myDict are : 4 After remove operation Total key/value pairs in myDict are : 3
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sorteddictionary-2.remove?view=netframework-4.7.2
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