how to convert an object of Item to an dictionary not idictionary in c#

My code 

Dictionary<string, string> FD = null;

foreach (object objarrayItem in ((ArrayList)innerHashPS[itemNamePS]))
{
// FD = (from x in objarrayItem.GetType().GetProperties() select x).ToDictionary(x => x.Name, x => (x.GetGetMethod().Invoke(objarrayItem, null).ToString()));

This is throwing error.

and i want to store or convert it to ana global dictinary not idictionary.how it will do?

}