indent selected paragraph where cursor is present

Question

hi,

I am using web browser control in winform to make htmleditor and want to indent paragraph where my cursor is and leaving other paragraph as same as it is , I am using htmldocument and want to do it like below as in code below but could not style it margin-indent:50px.

Got stuck ....

  

HtmlDocument doc = webBrowser.Document;

HtmlElementCollection para= doc.GetElementsByTagName("p");

 HtmlElement element in para

{

string cls = element.GetAttribute("<p class="current">");

cls.style=margin-indent:50px;

}

could not  succeed  please let me know if any change needed .....in above