C# Dictionary Initializer

C# Dictionary Initializer for beginners and professionals with examples on overloading, method overriding, inheritance, aggregation, base, polymorphism, sealed, abstract, interface, namespaces, exception handling, file io, collections, multithreading, reflection etc.

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C# Dictionary Initializer

C# Dictionary initializer is a feature which is used to initialize dictionary elements. Dictionary is a collection of elements. It stores elements in key and value pair.

Dictionary initializer uses curly braces ({}) to enclose the key and value pair.

Let's see an example, in which we are initializing value for each key.

C# Dictionary Initializer Example 1

using System;
using System.Collections.Generic;
namespace CSharpFeatures
{
    class DictionaryInitializer
    {
        public static void Main(string[] args)
        {
            Dictionary dictionary = new Dictionary()
            {
                [1] = "Irfan",
                [2] = "Ravi",
                [3] = "Peter"
            };
            foreach (KeyValuePair kv in dictionary)
            {
                Console.WriteLine("{ Key = " + kv.Key + " Value = " +kv.Value+" }");
            }
        }
    }
}

Output:

{ Key = 1 Value = Irfan }
{ Key = 2 Value = Ravi }
{ Key = 3 Value = Peter }

In this example, we are storing student data into the dictionary. We are using dictionary initializer to store student data. See, the following example.

C# Dictionary Initializer Example 2

using System;
using System.Collections.Generic;
namespace CSharpFeatures
{
    class Student
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
    }
    class DictionaryInitializer
    {
        public static void Main(string[] args)
        {
            Dictionary dictionary = new Dictionary()
            {
                { 1, new Student(){ ID = 101, Name = "Rahul Kumar", Email = "rahul@example.com"} },
                { 2, new Student(){ ID = 102, Name = "Peter", Email = "peter@example.com"} },
                { 3, new Student(){ ID = 103, Name = "Irfan", Email = "irfan@abc.com"} }
            };
            foreach (KeyValuePair kv in dictionary)
            {
                Console.WriteLine("Key = "+kv.Key + " Value = {" + kv.Value.ID +", "+ kv.Value.Name +", "+kv.Value.Email+"}");
            }
        }
    }
}

Output:

Key = 1 Value = {101, Rahul Kumar, [email protected]}
Key = 2 Value = {102, Peter, [email protected]}
Key = 3 Value = {103, Irfan, [email protected]}

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C# Dictionary Initializer

C# Dictionary Initializer

C# Dictionary Initializer Example 1

C# Dictionary Initializer Example 2

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