title: IsDouble check for string in Vb.net?
body: <p>I will get data in <code>DataTable</code>. I am going to iterate data in <code>foreach</code>. I will have all types of data in <code>Datatable</code>. Now I need to find <code>Double</code> for each item (<code>string</code>) in <code>DataTable</code>. How to find <code>IsDouble</code> for string? </p>
  
  <p>Ex:</p>
  
  <p>I have <code>"21342.2121"</code> string. I need to covert this to <code>Double</code>. But sometimes the data will be <code>"TextString"</code>. So I can't use <code>Double.Parse()</code>.</p>
  
  <p>How to handle this?</p>