title: Format a decimal without comma
body: <p>i try to format a decimal as 0:0.0 in c# 
  tried this code</p>
  
  <pre><code>string nv = textBox7.Text.Trim().Replace(',', '.');
  
  res =  Convert.ToDecimal(nv, new CultureInfo("en-GB"));
  </code></pre>
  
  <p>but res always show a result with a comma, tried also with </p>
  
  <pre><code>new CultureInfo("en-GB")
  </code></pre>
  
  <p>but the problem persist 
  And thank you in advance.</p>