data type SapProxy in .net connector

Hi, i just want to know how is correct to work with SapProxy data type (.net connector 2.0 in visual studio 2003.)

I want to use more bapi functions but if i add more bapis to one sapProxy data type, that constructor of sapProxy raise an exception. But no everytime 😊

If i create different sapProxy data types for diferent bapis it work properly, but i need to use so many bapis and i will have equal many sapProxies data types. Is there some else possibility. Thank for your ideas. Palo