As Title and below figure

When I use nRF51422 dongle pca10031 , the Network Availability can discover , connect and read device rssi.
Here, I want to use nRF pca10059 in Network Availability, How to implement.
I know use MasterEmulator dll. But it doesn't work by using nRF52840 dongle pca10059.
What approach should I implement discover, connect and read rssi by using nRF52840 dongle pca10059.in C# program?
