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monomonodevelopsteamsteambot

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

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

Solution

  • 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