c# - 如何使用 C# 4.0 编译器让 MonoDevelop 以 .NET 2.0 框架为目标？

Question

这很容易使用 Visual Studio 实现，但我需要使用 MonoDevelop 来实现这一点，因为 Visual Studio 编译的 DLL 不能很好地与 Unity 配合使用。 MonoDevelop DLL 工作正常，但我想在面向 .NET 2.0 运行时时使用默认函数参数(C# 4.0 功能)。

这在 MonoDevelop 中可行吗？我该如何设置？

添加:为 Visual Studio 和 MonoDevelop 构建命令行

为了便于比较，我对参数进行了排序:

MonoDevelop : Target = Mono/.NET 4

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
/noconfig
/warn:4
"/define:TRACE"
/optimize+
"/out:C:\TestLibraries\TestEditor\bin\Release\TestEditor.dll"
/t:library

/nologo

"/r:C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.dll"
"/r:C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Core.dll"
"/r:C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEditor.dll"
"/r:C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEngine.dll"

/fullpaths
/utf8output

MonoDevelop : Target = Mono/.NET 3.5(第一个有趣的)

C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe
/warn:4
"/define:TRACE"
/optimize+
"/out:C:\TestLibraries\TestEditor\bin\Release\TestEditor.dll"
/t:library

/nologo
-nostdlib

"/r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll"
"/r:C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll"
"/r:C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEditor.dll"
"/r:C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEngine.dll"

/fullpaths
/utf8output

Visual Studio:目标 = .NET 4

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Csc.exe
/noconfig
/nowarn:1701,1702
/warn:4
/define:TRACE
/optimize+
/out:obj\Release\TestEditor.dll
/target:library

/nostdlib+ /errorreport:prompt

/reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\mscorlib.dll"
/reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Core.dll"
/reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.dll"
/reference:"C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEngine.dll"

/debug:pdbonly
/filealign:512

Visual Studio : Target = .NET 3.5(第二个有趣的)

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Csc.exe
/noconfig
/nowarn:1701,1702
/warn:4
/define:TRACE
/optimize+
/out:obj\Release\TestEditor.dll
/target:library

/nostdlib+ /errorreport:prompt

/reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll
/reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll"
/reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll
/reference:"C:\Program Files (x86)\Unity\Editor\Data\Managed\UnityEngine.dll"

/debug:pdbonly
/filealign:512

Answer 1

最新稳定的 Mono 版本 (2.10.9) 附带的 2.0 C# 编译器 (mcs/gmcs) 支持默认函数参数。我刚刚新建了一个console工程，把target framework改成2.0，默认函数参数编译成功。