C# one function : Querying the DCE/RPC endpoint mapper port 135

I need one function in C# that will connect to the DCE/RPC endpoint mapper (EPMAP) (port 135) on a remote Windows PC and check if there is an endpoint for the samr interface. Example UID: 12345778-1234-abcd-ef00-0123456789ac The endpoint mapper listens to TCP port 135 and uses the DCE/RPC protocol. For an example of the protocol you can use the tool [login to view URL] (available on the Microsoft website). This tool will list all endpoints, we are looking for a way to query for one specific endpoint. The code must take an IP address and a UID as parameters and return true if and only if an endpoint with that UID exists. You can use .NET and the Windows API. The code must run on Windows XP or later.