Returns a string representation of the MpnSubscriptionInfo. An MpnSubscriptionInfo object is represented by its three properties device, trigger and notification format, prefixed by their name and on separate lines.E.g.: 

device=Apple/com.lightstreamer.ios.stocklist/8fac[...] fe12n 

trigger=Double.parseDouble(${last_price}) >= 50.0n 

notificationFormat={aps={badge=AUTO, alert=Price is over 50$, sound=Default}}n 

public: string ToString();

public override string ToString();

Public override Function ToString() As string