c# - 尝试更改控制台前景色时，Mono 应用程序因 ArgumentNullException 而失败

Question

当我尝试启动这个应用程序时:

private static void Main(string[] args)
{
    Console.ForegroundColor = ConsoleColor.Cyan;
    Console.WriteLine("test");
}

在单声道下，它失败并出现以下异常:

Unhandled Exception:
System.ArgumentNullException: Argument cannot be null.
Parameter name: format
  at System.ParameterizedStrings.Evaluate (System.String format, FormatParam[] args) [0x00000] in <filename unknown>:0
  at System.TermInfoDriver.ChangeColor (System.String format, ConsoleColor color) [0x00000] in <filename unknown>:0
  at System.TermInfoDriver.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at System.ConsoleDriver.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at System.Console.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at FudpLoader.Application.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Argument cannot be null.
Parameter name: format
  at System.ParameterizedStrings.Evaluate (System.String format, FormatParam[] args) [0x00000] in <filename unknown>:0
  at System.TermInfoDriver.ChangeColor (System.String format, ConsoleColor color) [0x00000] in <filename unknown>:0
  at System.TermInfoDriver.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at System.ConsoleDriver.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at System.Console.set_ForegroundColor (ConsoleColor value) [0x00000] in <filename unknown>:0
  at FudpLoader.Application.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0

Mono 的版本是:

Mono JIT compiler version 4.0.2 (Stable 4.0.2.5/c99aa0c Чт. сент. 17 16:22:45 MSK 2015)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
        TLS:           __thread
        SIGSEGV:       normal
        Notifications: epoll
        Architecture:  armel,vfp+hard
        Disabled:      aot,profiler,debug
        Misc:          softdebug
        LLVM:          supported, not enabled.
        GC:            sgen

在 Linux 中启动，使用 BuildRoot 构建并在 ARM 处理器上运行。如果我不尝试改变控制台的颜色，应用程序工作正常；如果我在 Linux 虚拟机上启动它，彩色应用程序也能正常工作。

Answer 1

我需要设置环境变量TERM，TermInfo 开始正常工作。就我而言，它是:

export TERM=xterm-color