HOWTO CAST ParameterDirection

Question

I have a big problem. I have an outside XML file where i can find information at runtime to an object datatype for an oracle db So i can provide some form of dynamics with the code. My problems arrive when i read the value of the node of the property that i want. as soon as i read with string test=xml..value i read that and i want to convert to ParameterDirection (this is an enum) how can arrive to that. I think that with an object i resolve but i cannot ParameterDirection test2=(ParameterDirection)test does an ivalid cast exception Please hellp me