OrderedDictionary.Keys property is used to get an ICollection object containing the keys in the OrderedDictionary collection.
Syntax:
public System.Collections.ICollection Keys { get; }
Return Value: It returns an ICollection object containing the keys in the OrderedDictionary collection.
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to get an ICollection // containing the keys in OrderedDictionary using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver method
public static void Main()
{
// Creating a orderedDictionary named myDict
OrderedDictionary myDict = new OrderedDictionary();
// Adding key and value in myDict
myDict.Add( "key1" , "value1" );
myDict.Add( "key2" , "value2" );
myDict.Add( "key3" , "value3" );
myDict.Add( "key4" , "value4" );
myDict.Add( "key5" , "value5" );
// Getting an ICollection containing
// the keys in OrderedDictionary
ICollection keyCollection = myDict.Keys;
// Creating a String array
String[] myKeys = new String[myDict.Count];
// Copying the OrderedDictionary elements to
// a one-dimensional Array object at the
// specified index.
keyCollection.CopyTo(myKeys, 0);
for ( int i = 0; i < myDict.Count; i++) {
Console.WriteLine(myKeys[i]);
}
}
} |
Output:
key1 key2 key3 key4 key5
Example 2:
// C# code to get an ICollection // containing the keys in OrderedDictionary using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver method
public static void Main()
{
// Creating a orderedDictionary named myDict
OrderedDictionary myDict = new OrderedDictionary();
// Adding key and value in myDict
myDict.Add( "A" , "Apple" );
myDict.Add( "B" , "Banana" );
myDict.Add( "C" , "Cat" );
myDict.Add( "D" , "Dog" );
// Getting an ICollection containing
// the keys in OrderedDictionary
ICollection keyCollection = myDict.Keys;
// Creating a String array
String[] myKeys = new String[myDict.Count];
// Copying the OrderedDictionary elements to
// a one-dimensional Array object at the
// specified index.
keyCollection.CopyTo(myKeys, 0);
for ( int i = 0; i < myDict.Count; i++) {
Console.WriteLine(myKeys[i]);
}
}
} |
Output:
A B C D
Reference: