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How To Set Attribute Option Element In OpenWebkitSharp C#

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Here's how you set option element attribute using OpenWebKitSharp. 
foreach (WebKit.DOMNode optionElement in nodeItem.ChildNodes)  
 {  
   if (searchInnerHtml && optionElement.TextContent.Equals(searchInnerString))  
   {  
       WebKit.InteropIDOMHTMLElement el =    
       (WebKit.Interop.IDOMHTMLElement)optionElement.GetWebKitObject();  
       el.setAttribute("selected", "selected");  
   }  
 }

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