title: how to join two different JSON into single JSON in C#
body: <p>My first JSON is as follows</p>
  
  <pre><code>[{
      "UserId": 4,
      "FirstName": "rupesh",
      "LastName": "Abc",
      "Email": "abc@gmail.com",
      "Gender": "Male"
  }]
  </code></pre>
  
  <p>My Second JSON is as follows </p>
  
  <pre><code> [{
      "AccountId": 2,
      "AccountName": "rupeshinfo",
      "AccountDomain": null,
      "RoleId": 1,
      "UserId": 4
  }, {
      "AccountId": 3,
      "AccountName": "Rameshinfo",
      "AccountDomain": null,
      "RoleId": 2,
      "UserId": 4
  }]
  </code></pre>
  
  <p>the result must be</p>
  
  <pre><code>{
      "UserDetails": [{
          "UserId": 4,
          "FirstName": "rupesh",
          "LastName": "Abc",
          "Email": "abc@gmail.com",
          "Gender": "Male"
      }],
      "AccountDetails": [{
          "AccountId": 2,
          "AccountName": "rupeshinfo",
          "AccountDomain": null,
          "RoleId": 1,
          "UserId": 4
      }, {
          "AccountId": 3,
          "AccountName": "Rameshinfo",
          "AccountDomain": null,
          "RoleId": 2,
          "UserId": 4
      }]
  
  }
  </code></pre>