title: How to select an element's value from a JArray
body: <p>I'm having a bit of trouble with C# (VS 2017, .Net 4.6) code. It'd be great if someone could help. I have a JSON file:</p>
  
  <pre><code>{
    "makerCommission": 10,
    "takerCommission": 10,
    "buyerCommission": 0,
    "updateTime": 1540015045989,
    "balances": [
      {
        "asset": "BTC",
        "free": "0.22222222",
        "locked": "0.00000000"
      },
      {
        "asset": "LTC",
        "free": "2.00000000",
        "locked": "3.00000000"
      },
      {
        "asset": "ETH",
        "free": "4.00000000",
        "locked": "5.00000000"
      }
    ]
  }
  </code></pre>
  
  <p>I would like to retrieve the "free" value of any coin using:</p>
  
  <pre><code>result = (dynamic)JArray.Parse(MyData)
  </code></pre>
  
  <p>I do not want to retrieve all free values. How can I get 0.22222222, if I pick BTC? </p>