3706A How to program in C#？

How to use .Net to program the device 3706A and extract and analyze data from the device.

For control of 3706A from .NET (C#), I'd suggest:

approach 1:  use a VISA layer and directly send the instrument commands (3706A Reference Manual)
approach 2:  use IVI driver.  This will leverage NI VISA runtime to communicate with the 3706A;  driver commands are translated to the instrument commands for you.

Both NI VISA and the IVI driver distribute some sample code in C#.