StringDictionary.Clear method is used to remove all the entries from the StringDictionary.
Syntax:
public virtual void Clear ();
Exception: This method will give the NotSupportedException if the StringDictionary is read-only.
Example:
// C# code to remove all entries // from the StringDictionary using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a StringDictionary named myDict
StringDictionary myDict = new StringDictionary();
// Adding key and value into the StringDictionary
myDict.Add( "A" , "Apple" );
myDict.Add( "B" , "Banana" );
myDict.Add( "C" , "Cat" );
myDict.Add( "D" , "Dog" );
myDict.Add( "E" , "Elephant" );
myDict.Add( "F" , "Fish" );
// Displaying the keys and values in StringDictionary
Console.WriteLine( "The number of key/value pairs are : " + myDict.Count);
foreach (DictionaryEntry dic in myDict)
{
Console.WriteLine(dic.Key + " " + dic.Value);
}
// Removing all entries from the StringDictionary
myDict.Clear();
// Displaying the keys and values in StringDictionary
Console.WriteLine( "The number of key/value pairs are : " + myDict.Count);
foreach (DictionaryEntry dic in myDict)
{
Console.WriteLine(dic.Key + " " + dic.Value);
}
}
} |
Output:
The number of key/value pairs are : 6 b Banana c Cat a Apple f Fish d Dog e Elephant The number of key/value pairs are : 0
Note: This method is an O(n) operation, where n is Count.
Reference: