C# | OrderedDictionary.Item[Object] Property Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report There are two methods in the overload list of this property as follows: Item[Int32] : Used to get or set the value at the specified index.Item[Object] : Used to get or set the value with the specified key. OrderedDictionary.Item[Int32] Property This property is used to get or set the value at the specified index.Syntax: public object this[int index] { get; set; } Here, index is the zero-based index of the value to get or set.Return Value: The value of the item at the specified index.Exceptions: NotSupportedException : If the OrderedDictionary collection is read-only.ArgumentOutOfRangeException : If the index is less than zero OR index is equal to or greater than Count. Below given are some examples to understand the implementation in a better way: Example 1: CSHARP // C# code to get or set the value // at the specified index for // 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"); // To get or set the value at the // specified index for OrderedDictionary Console.WriteLine(myDict[1]); } } Output: value2 Example 2: CSHARP // C# code to get or set the value // at the specified index for // 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"); // To get or set the value at the // specified index for OrderedDictionary // This should raise "ArgumentOutOfRangeException" // as index is less than 0 Console.WriteLine(myDict[-3]); } } Runtime Error: Unhandled Exception: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Note: This property allows you to access a specific element in the collection by using the syntax : myCollection[index]. OrderedDictionary.Item[Object] Property This property is used to get or set the value with the specified key.Syntax: public object this[object key] { get; set; } Here, key is the key of the value to get or set.Return Value: The value associated with the specified key. If the specified key is not found, attempting to get it returns null, and attempting to set it creates a new element using the specified key.Exception : This property will give NotSupportedException if the property is being set and the OrderedDictionary collection is read-only.Example: CSHARP // C# code to get or set the // value with the specified key 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"); // To get or set the value // with the specified key Console.WriteLine(myDict["key3"]); } } Output: value3 Note: This property allows you to access a specific element in the collection by using the syntax : myCollection[key].A key cannot be null, but a value can be. Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.ordereddictionary.item?view=netframework-4.7.2 Comment More infoAdvertise with us S Sahil_Bansall Follow Improve Article Tags : C# CSharp-Specialized-Namespace CSharp-Specialized-OrderedDictionary Similar Reads IntroductionC# TutorialC# (pronounced "C-sharp") is a modern, versatile, object-oriented programming language developed by Microsoft in 2000 that runs on the .NET Framework. Whether you're creating Windows applications, diving into Unity game development, or working on enterprise solutions, C# is one of the top choices fo 4 min read Introduction to .NET FrameworkThe .NET Framework is a software development framework developed by Microsoft that provides a runtime environment and a set of libraries and tools for building and running applications on Windows operating systems. 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