How to add key value pair to static dictionary in C#

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I have a static dictionary

public static Dictionary<Guid, Dictionary<string, object>> Store {get; set;}

I want to add value to the above dictionary from another class as

Guid clientId = Guid.NewGuid();
Dictionary<string,object> storageKeyDictionary = new Dictionary<string, object>() { { "parameter", "test" }};

Storage.Store.Add(clientId, storageKeyDictionary);

But it return error as "Object reference not set to an instance of an object." while executing, please tell me what is wrong with the code?

What I have tried:

I have tried to add value to private static dictionary but returned error.

Posted 18-Jun-17 20:40pm

Member 10752313

Updated 18-Jun-17 21:14pm

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RickZeeland · Accepted Answer · 2017-06-18T21:14:00

Solution 1

Your code is almost correct, but before Storage.Store.Add() you are missing:

C#

Store = new Dictionary<Guid, Dictionary<string, object>>();

Posted 18-Jun-17 21:14pm

RickZeeland

uspatel · Accepted Answer · 2017-06-18T21:14:00

you have to initialize your store object first.Use like below

public class Program
   {
       public static Dictionary<Guid, Dictionary<string, object>> Store {get; set;}

       static Program()
       {
           Store=new  Dictionary<Guid, Dictionary<string, object>>();
       }
       public static void Main(string[] args)
       {

           Guid clientId = Guid.NewGuid();
           Dictionary<string,object> storageKeyDictionary = new Dictionary<string, object>() { { "parameter", "test" }};

           Store.Add(clientId, storageKeyDictionary);

           //Your code goes here
           Console.WriteLine("Hello, world!");
       }
   }

or you can directly write like

public class Program
    {
        public static Dictionary<Guid, Dictionary<string, object>> Store =new  Dictionary<Guid, Dictionary<string, object>>();
        
      
        public static void Main(string[] args)
        {
            
            Guid clientId = Guid.NewGuid();
            Dictionary<string,object> storageKeyDictionary = new Dictionary<string, object>() { { "parameter", "test" }};

            Store.Add(clientId, storageKeyDictionary);
            
            //Your code goes here
            Console.WriteLine("Hello, world!");
        }
    }

How to add key value pair to static dictionary in C#

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How to add key value pair to static dictionary in C#

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