Example of sum for json array

json_sum.cs

using System;
using System.IO;
using Newtonsoft.Json;

namespace ConsoleApp1
{
    /// <summary>
    /// Example of sum for json array
    /// </summary>
    class Program
    {
        static void Main( string[] args )
        {
            var json = "[1,'2',3,'a',4]";

            JsonTextReader reader = new JsonTextReader( new StringReader( json ) );

            int result = 0;

            while( reader.Read() )
            {
                if( reader.Value != null )
                {
                    switch( reader.TokenType )
                    {
                        case JsonToken.Integer:
                            result += Convert.ToInt32( reader.Value );
                            break;
                        case JsonToken.String:
                            if( Int32.TryParse( reader.Value.ToString(), out int r ) )
                            {
                                result += r;
                            }
                            break;
                        default:
                            break;
                    }
                }
            }

            Console.WriteLine( "The sum of array is :" + result );

            Console.WriteLine( "End of program." );
            Console.ReadLine();
        }
    }
}