how to call oracle stored function in C#

Question

Hi Dear All, I am working in C# with Oracl. i want to use Oracle Stored functions and Procedures in C#. I am using OLEDB.Net. Functions have parameters and stored procedures have In and out parameters . how i call these and use return values from oralce function Please tell me with code exampels. I will be thankfull................... Aahiqbhatti.