Error when trying to run steambot on vps debian System.MissingMethodException: Method not found: 'System.Array.Empty' - mono

Question

I have built the solution using monodevelop on windows, then transferred the files to my vps using Filezilla. It works fine on windows. But when i try to run steambot using mono steambot.exe i get the errors:
Unhandled Exception: System.MissingMethodException: Method not found: 'System.Array.Empty'.
at SteamBot.Program.BotManagerMode () [0x00000] in <filename unknown>:0
at SteamBot.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method not found: 'System.Array.Empty'.
at SteamBot.Program.BotManagerMode () [0x00000] in <filename unknown>:0
at SteamBot.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
mattimat#mattimat-ubuntu:~/steambot/SteamBot-master/Bin/Release$ mono SteamBot.exe
Missing method System.Array::Empty<[1]>() in assembly /usr/lib/mono/4.0/mscorlib.dll, referenced in assembly /home/mattimat/steambot/SteamBot-master/Bin/Release/SteamBot.exe
Unhandled Exception: System.MissingMethodException: Method not found: 'System.Array.Empty'.
at SteamBot.Program.BotManagerMode () [0x00000] in <filename unknown>:0
at SteamBot.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method not found: 'System.Array.Empty'.
at SteamBot.Program.BotManagerMode () [0x00000] in <filename unknown>:0
at SteamBot.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
mattimat#mattimat-ubuntu:~/steambot/SteamBot-master/Bin/Release$
Mono version:
Mono JIT compiler version 2.10.8.1 (Debian 2.10.8.1-8+deb7u1)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: x86
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
Again, works fine on windows. VPS is Debian 7.11 x32

Answer 1

public static T[] System.Array.Empty<T>() was added in .Net 4.6 and thus your older version of Mono would be running .Net 4.5 and the error would be expected.
Either update your version of Mono to 4.8+ or removed the usage of Array.Empty and compile against the .Net 4.5 framework.
re: https://msdn.microsoft.com/en-us/library/dn906179(v=vs.110).aspx