Read the Json File content added as EmbeddedResources in your VS project

JsonFileHelper.cs

using System;
using System.IO;
using System.Reflection;

namespace WhateverYourNamespace
{
    public static class JsonFileHelper
    {
        public static string GetJsonFileString()
        {
            // get current assembly
            var assembly = Assembly.GetExecutingAssembly();
            // get the embedded file path
            var resourceName = "WhateverYourNamespace.Resources.myjsondata.json";

            string jsonString = string.Empty;
            // load the file data stream
            using (Stream stream = assembly.GetManifestResourceStream(resourceName))
            using (StreamReader reader = new StreamReader(stream))
            {
                // read the json string
                jsonString = reader.ReadToEnd();
            }

            // jsonString : your json content string is ready
            return jsonString;
        }
    }
}