再谈 C# 交互窗口
Ubuntu 10.10 操作系统中自带的是 mono 2.6.7：
ben@ben-m4000t:~$ cat /etc/issue Ubuntu 10.10 \n \l ben@ben-m4000t:~$ mono --version Mono JIT compiler version 2.6.7 (Debian 2.6.7-3ubuntu1) Copyright (C) 2002-2010 Novell, Inc and Contributors. TLS: __thread GC: Included Boehm (with typed GC and Parallel Mark) SIGSEGV: altstack Notifications: epoll Architecture: amd64 Disabled: none ben@ben-m4000t:~$ gmcs --version Mono C# compiler version 2.6.7.0 ben@ben-m4000t:~$ csharp --version Mono C# compiler version 2.1.0.0 ben@ben-m4000t:~$ which csharp /usr/bin/csharp ben@ben-m4000t:~$ cat /usr/bin/csharp #!/bin/sh exec /usr/bin/mono $MONO_OPTIONS /usr/lib/mono/2.0/csharp.exe "$@" ben@ben-m4000t:~$目前最新版本是 mono 2.8.1。因此，在 Ubuntu 10.10 操作系统中安装 mono 2.8.1 ：
ben@ben-m4000t:~/src$ wget ben@ben-m4000t:~/src$ tar xjf mono-2.8.1.tar.bz2 ben@ben-m4000t:~/src$ rm mono-2.8.1.tar.bz2 ben@ben-m4000t:~/src$ cd mono-2.8.1 ben@ben-m4000t:~/src/mono-2.8.1$ ./configure --prefix=http://www.mamicode.com/opt/mono-2.8.1 ben@ben-m4000t:~/src/mono-2.8.1$ make ben@ben-m4000t:~/src/mono-2.8.1$ sudo make install然后看看安装后的效果：
ben@ben-m4000t:~/src/mono-2.8.1$ cd /opt/mono-2.8.1 ben@ben-m4000t:/opt/mono-2.8.1/bin$ ./mono --version Mono JIT compiler version 2.8.1 (tarball 2010年 12月 01日 星期三 08:50:53 CST) Copyright (C) 2002-2010 Novell, Inc and Contributors. TLS: __thread SIGSEGV: altstack Notifications: epoll Architecture: amd64 Disabled: none Misc: debugger softdebug LLVM: supported, not enabled. GC: Included Boehm (with typed GC and Parallel Mark) ben@ben-m4000t:/opt/mono-2.8.1/bin$ ./dmcs --version Mono C# compiler version 2.8.1.0 ben@ben-m4000t:/opt/mono-2.8.1/bin$ ./csharp --version Mono C# compiler version 4.0.0.0 ben@ben-m4000t:/opt/mono-2.8.1/bin$ cat csharp #!/bin/sh exec /opt/mono-2.8.1/bin/mono $MONO_OPTIONS /opt/mono-2.8.1/lib/mono/4.0/csharp.exe "$@"然后把 Ubuntu 10.10 操作系统中的 /opt/mono-2.8.1/lib/mono/4.0/csharp.exe 文件拷贝到安装了 Microsoft .NET Framework 4 的 Microsoft Windows Server 2003 R2 Enterprise Edition Service Pack2 操作系统中，运行 csharp.exe：
C:\bin\CsharpRepl> csharp 未经处理的异常: System.IO.FileNotFoundException: 未能加载文件或程序集 “Mono.CSharp, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756” 或它的某一个依赖项。系统找不到指定的文件。 在 Mono.Driver.Startup(String[] args) 在 Mono.Driver.Main(String[] args)哎呀，运行出错了。还需要一个 Mono.CSharp.dll 才能运行。让我们来找出这个 Mono.CSharp.dll 吧：
ben@ben-m4000t:/opt/mono-2.8.1$ find . -name Mono.CSharp.dll ./lib/mono/4.0/Mono.CSharp.dll ./lib/mono/2.0/Mono.CSharp.dll ./lib/mono/gac/Mono.CSharp/4.0.0.0__0738eb9f132ed756/Mono.CSharp.dll ./lib/mono/gac/Mono.CSharp/2.0.0.0__0738eb9f132ed756/Mono.CSharp.dll ben@ben-m4000t:/opt/mono-2.8.1$ ll lib/mono/4.0/Mono.CSharp.dll lrwxrwxrwx 1 root root 60 2010-12-01 09:07 lib/mono/4.0/Mono.CSharp.dll -> ../gac/Mono.CSharp/4.0.0.0__0738eb9f132ed756/Mono.CSharp.dll ben@ben-m4000t:/opt/mono-2.8.1$ ll lib/mono/gac/Mono.CSharp/4.0.0.0*/Mono.CSharp.dll -rwxr-xr-x 1 root root 1105408 2010-12-01 09:07 lib/mono/gac/Mono.CSharp/4.0.0.0__0738eb9f132ed756/Mono.CSharp.dll ben@ben-m4000t:/opt/mono-2.8.1$因此，把 Ubuntu 操作系统中上述 gac 目录中的 Mono.CSharp.dll 拷贝到 Windows 操作系统中，再次运行 csharp.exe ：
C:\bin\CsharpRepl> dir 驱动器 C 中的卷没有标签。 卷的序列号是 F0AA-2E0D C:\bin\CsharpRepl 的目录 2010-12-01 10:13 . 2010-12-01 10:13 .. 2010-12-01 09:07 37,376 csharp.exe 2010-12-01 09:07 1,105,408 Mono.CSharp.dll 2 个文件 1,142,784 字节 2 个目录 9,746,513,920 可用字节 C:\bin\CsharpRepl> csharp C:\bin\CsharpRepl>这次运行没有出错，而是直接退出了。这更糟糕了。只好找到 csharp.exe 的 C# 源程序看看发生了什么。
ben@ben-m4000t:/opt/mono-2.8.1/bin$ cd ~/src/mono-2.8.1 ben@ben-m4000t:~/src/mono-2.8.1$ find . -name csharp ./mcs/tools/csharp ./scripts/csharp ben@ben-m4000t:~/src/mono-2.8.1$ cd mcs/tools/csharp ben@ben-m4000t:~/src/mono-2.8.1/mcs/tools/csharp$ ll 总计 56 -rw-r--r-- 1 ben ben 2434 2010-11-12 18:32 ChangeLog -rw-r--r-- 1 ben ben 60 2010-11-12 18:24 csharp.exe.sources -rw-r--r-- 1 ben ben 22963 2010-11-12 18:24 getline.cs -rw-r--r-- 1 ben ben 672 2010-11-12 18:24 Makefile -rw-r--r-- 1 ben ben 16749 2010-11-12 18:24 repl.cs ben@ben-m4000t:~/src/mono-2.8.1/mcs/tools/csharp$上面的 repl.cs 就是 csharp.exe 的 C# 源程序之一，其中包含 Main 方法。下面是 repl.cs 的开头部分：
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//
//
repl.cs: Support for using the compiler in interactive mode (read-eval-print loop)
//
//
Authors:
//
Miguel de Icaza (miguel@gnome.org)
//
//
Dual licensed under the terms of the MIT X11 or GNU GPL
//
//
Copyright 2001, 2002, 2003 Ximian, Inc ()
//
Copyright 2004, 2005, 2006, 2007, 2008 Novell, Inc
//
//
//
TODO:
//
Do not print results in Evaluate, do that elsewhere in preparation for Eval refactoring.
//
Driver.PartialReset should not reset the coretypes, nor the optional types, to avoid
//
computing that on every call.
//
using System;
using System.IO;
using System.Text;
using System.Globalization;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.Collections.Generic;
using Mono.CSharp;
namespace Mono
{
public class Driver
{
static int Main
(string []
args)
{
#if
!ON_DOTNET
if (args.Length
> 0 && args [0] == "--attach")
{
new ClientCSharpShell
(Int32.Parse (args [1])).Run (null);
return 0;
}
if (args.Length
> 0 && args [0].StartsWith ("--agent:"))
{
new CSharpAgent
(args [0]);
return 0;
}
#endif
return Startup(args);
}
static int Startup
(string[]
args)
{
string[]
startup_files;
try {
startup_files
= Evaluator.InitAndGetStartupFiles (args);
Evaluator.DescribeTypeExpressions
= true;
Evaluator.SetInteractiveBaseClass
(typeof (InteractiveBaseShell));
}
catch {
return 1;
}
return new CSharpShell
().Run (startup_files);
}
}
}
问题就出在第 52 行到第 65 行的 Startup 方法中。因此在该方法中增加一些 Debug 语句：
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