blocks|key|3308595|text|我不明白如何使用C#编译器(或VB编译器)编译一个项目而不让它在编译器使用错误的语言时犹豫不决。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3308596|将C#代码保存在与VB项目不同的项目中。您可以将这些项目包含在同一解决方案中。|3308597|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I don't see how you can compile a project with the C# compiler (or the VB compiler) and not have it balk at the wrong language for the compiler.

Keep your C# code in a separate project from your VB project. You can include these projects into the same solution.

blocks|key|334209|text|您不能在同一项目中混合使用vb和c#+-如果您注意到在visual+studio中，项目文件是.vbproj或.csproj。你可以在一个解决方案中-在vb中有一个项目，在c#中有一个项目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|334210|根据这一点，您可以在App_Code目录下的web项目中使用它们：|334211|http://pietschsoft.com/post/2006/03/30/ASPNET-20-Use-VBNET-and-C-within-the-App_Code-folder.aspx|offset|length|334212|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|2O|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|E]]]]

You can not mix vb and c# within the same project - if you notice in visual studio the project files are either .vbproj or .csproj. You can within a solution - have 1 proj in vb and 1 in c#.

Looks like according to this you can potentially use them both in a web project in the App_Code directory:

<a href="http://pietschsoft.com/post/2006/03/30/ASPNET-20-Use-VBNET-and-C-within-the-App_Code-folder.aspx" rel="noreferrer">http://pietschsoft.com/post/2006/03/30/ASPNET-20-Use-VBNET-and-C-within-the-App_Code-folder.aspx</a>

blocks|key|334241|text|不，你不能。一个程序集/项目(每个项目通常编译成一个程序集)必须是一种语言。但是，您可以使用多个程序集，并且每个程序集都可以用不同的语言编码，因为它们都编译为CIL。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|334242|它编译得很好，没有任何问题，因为VB.NET项目实际上只编译.vb文件，而C#项目实际上只编译.cs文件。它忽略了其他的，因此你没有收到错误。|334243|编辑：如果您将.vb文件添加到C#项目中，请在解决方案资源管理器面板中选择该文件，然后查看属性面板，您会注意到构建操作是“内容”，而不是“编译”。它被视为一个简单的文本文件，甚至不会作为二进制资源嵌入到编译后的程序集中。|offset|length|style|BOLD|334244|编辑:使用asp.net网站的您可以将c#+web用户控件添加到vb.net网站|334245|entityMap^0|0|0|0|3|0|0|F|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@$F|Q|G|R|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@$F|T|G|U|H|I]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

No, you can't. An assembly/project (each project compiles to 1 assembly usually) has to be one language. However, you can use multiple assemblies, and each can be coded in a different language because they are all compiled to CIL.
It compiled fine and didn't complain because a VB.NET project will only actually compile the .vb files and a C# project will only actually compile the .cs files. It was ignoring the other ones, therefore you did not receive errors.
Edit: If you add a .vb file to a C# project, select the file in the Solution Explorer panel and then look at the Properties panel, you'll notice that the Build Action is 'Content', not 'Compile'. It is treated as a simple text file and doesn't even get embedded in the compiled assembly as a binary resource.
Edit: With asp.net websites you may add c# web user control to vb.net website

blocks|key|331544|text|每种语言都需要一个项目。我很有信心我看到了一个合并了程序集的工具，如果你找到了这个工具，你应该就可以开始工作了。如果您需要在同一个类中使用这两种语言，您应该能够用VB.net编写一半代码，然后通过继承VB.net类用C#编写其余的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|331545|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You need one project per language. I'm quite confident I saw a tool that merged assemblies, if you find that tool you should be good to go. If you need to use both languages in the same class, you should be able to write half of it in say VB.net and then write the rest in C# by inheriting the VB.net class.

blocks|key|336653|text|正如其他人所说，你不能把两个都放在一个项目中。但是，如果您只有一小段C#或VB代码想要包含在另一种语言的项目中，则可以使用automatic+conversion+tools。它们并不完美，但大多数事情都做得很好。此外，SharpDevelop还内置了一个转换实用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|336654|entityMap|0|LINK|mutability|MUTABLE|url|http://www.developerfusion.com/tools/convert/csharp-to-vb/|1|http://www.icsharpcode.net/OpenSource/SD/^0|1Z|G|0|32|C|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

As others have said, you can't put both in one project. However, if you just have a small piece of C# or VB code that you want to include in a project in the other language, there are automatic <a href="http://www.developerfusion.com/tools/convert/csharp-to-vb/" rel="nofollow noreferrer">conversion tools</a>. They're not perfect, but they do most things pretty well. Also, <a href="http://www.icsharpcode.net/OpenSource/SD/" rel="nofollow noreferrer">SharpDevelop</a> has a conversion utility built in.

blocks|key|3095986|text|冒着重复其他答案的风险，不，你不能在同一个项目中混合它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3095987|除此之外，如果你刚刚完成了VB到C#的转换，为什么还要用VB写新的代码呢？|3095988|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

At the risk of echoing every other answer, no, you cannot mix them in the same project.

That aside, if you just finished converting VB to C#, why would you write new code in VB?

blocks|key|3308830|text|对于一些自定义MSBuild开发，这可能是可能的。提供的.targets强制项目是单一语言的-但是没有运行时或工具限制阻止这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3308831|VB和CS编译器都可以输出到模块-CLR版本的.obj文件。使用程序集链接器，您可以从VB和CS代码中提取模块并生成单个程序集。|3308832|这并不是说这是一项微不足道的工作，但它可能会奏效。|3308833|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

It might be possible with some custom MSBuild development. The supplied .targets force the projects to be single language - but there's no runtime or tooling restriction preventing this. 

Both the VB and CS compilers can output to modules - the CLR's version of .obj files. Using the assembly linker, you could take the modules from the VB and CS code and produce a single assembly.

Not that this would be a trival effort, but it probably would work.

blocks|key|334316|text|尽管Visual+Studio不支持这一点(您可以使用一些技巧并让MSBuild同时编译这两种功能，但不是在Visual+Studio内部)，但SharpDevelop支持。您可以在同一个解决方案中同时使用这两个工具(只要您运行的是Visual+Studio+Professional或更高版本)，所以如果您想继续使用Visual+Studio，最简单的解决方案就是将您的VB代码分离到不同的项目中，并以这种方式访问它。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|334317|entityMap|0|LINK|mutability|MUTABLE|url|http://www.icsharpcode.net/OpenSource/SD/^0|20|C|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Although Visual Studio does not support this (you can do some tricks and get MSBuild to compile both, but not from within Visual Studio), <a href="http://www.icsharpcode.net/OpenSource/SD/" rel="nofollow noreferrer">SharpDevelop</a> does. You can have both in the same solution (as long as you are running Visual Studio Professional and above), so the easiest solution if you want to keep using Visual Studio is to seperate your VB code into a different project and access it that way.

blocks|key|336675|text|对于.net+2.0，这是可行的。如果您在应用程序代码中使用相关语言代码创建的子目录，它会在同一项目中编译这两个目录。到目前为止，我正在寻找这是否应该在3.5中工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|336676|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For .net 2.0 this works. It DOES compile both in the same project if you create sub directories of in app code with the related language code. As of yet, I am looking for whether this should work in 3.5 or not though.

blocks|key|3096261|text|实际上，几年前我从一位同事那里继承了一个项目，他决定在同一个项目中混合使用VB和C#+webforms。这很有效，但维护起来一点也不有趣。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3096262|我决定新代码应该是C#类，为了让它们正常工作，我必须在web.config的编译部分添加一个子节点|3096263|++++++++<codeSubDirectories>
++++++++++++<add+directoryName="VB"/>
++++++++++++<add+directoryName="CS"/>
++++++++</codeSubDirectories>|code-block|syntax|javascript|3096264|所有VB代码放入App_Code中名为VB的子文件夹中，C#代码放入CS子文件夹中。这将生成两个.dll文件。它可以工作，但代码的编译顺序与"codeSubDirectories“中列出的顺序相同，因此，如果在C#和VB中都使用接口，则接口应位于VB文件夹中。|3096265|中有对VB和C#编译器的引用。|3096266|<system.codedom>
++++<compilers>|3096267|该项目目前已更新到框架3.5，并且仍然可以正常工作(但维护起来仍然没有乐趣。)|3096268|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|X|8|@]|9|@]|A|$G|H]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Well, actually I inherited a project some years ago from a colleague who had decided to mix VB and C# webforms within the same project. That worked but is far from fun to maintain.

I decided that new code should be C# classes and to get them to work I had to add a subnode to the compilation part of web.config

<pre><code> &lt;codeSubDirectories&gt;
 &lt;add directoryName="VB"/&gt;
 &lt;add directoryName="CS"/&gt;
 &lt;/codeSubDirectories&gt;
</code></pre>

The all VB code goes into a subfolder in the App_Code called VB and the C# code into the CS subfolder. This will produce two .dll files. It works, but code is compiled in the same order as listed in "codeSubDirectories" and therefore i.e Interfaces should be in the VB folder if used in both C# and VB.

I have both a reference to a VB and a C# compiler in

<pre><code>&lt;system.codedom&gt;
 &lt;compilers&gt;
</code></pre>

The project is currently updated to framework 3.5 and it still works (but still no fun to maintain..)

blocks|key|3309094|text|为什么不直接将您的VB代码编译到一个库(.dll)中，稍后再从您的代码中.Reference它，就是这样。托管dlls包含c#和vb都编译到的MSIL。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3309095|entityMap^0|9|2|K|4|1J|4|1P|2|1S|2|1Z|4|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|G|$]]

Why don't you just compile your <code>VB</code> code into a library(<code>.dll</code>).Reference it later from your code and that's it. Managed <code>dlls</code> contain <code>MSIL</code> to which both <code>c#</code> and <code>vb</code> are compiled.

blocks|key|3309108|text|演练:在网站项目http://msdn.microsoft.com/en-us/library/ms366714.aspx中使用多种编程语言|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3309109|3309110|默认情况下，App_Code文件夹不允许使用多种编程语言。但是，在网站项目中，您可以修改文件夹结构和配置设置以支持多种编程语言，如Visual+Basic和C#。这允许ASP.NET创建多个程序集，每种语言一个程序集。有关更多信息，请参见ASP.NET网站项目中的共享代码文件夹。开发人员通常在Web应用程序中包含多种编程语言，以支持独立操作的多个开发团队，并偏爱不同的编程语言。|blockquote|3309111|3309112|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms366714.aspx^0|8|1H|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|V|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Walkthrough: Using Multiple Programming Languages in a Web Site Project <a href="http://msdn.microsoft.com/en-us/library/ms366714.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/ms366714.aspx</a> 

<blockquote>
 By default, the App_Code folder does not allow multiple programming languages. However, in a Web site project you can modify your folder structure and configuration settings to support multiple programming languages such as Visual Basic and C#. This allows ASP.NET to create multiple assemblies, one for each language. For more information, see Shared Code Folders in ASP.NET Web Projects. Developers commonly include multiple programming languages in Web applications to support multiple development teams that operate independently and prefer different programming languages.
</blockquote>

blocks|key|3096309|text|不，不是在同一个project.but中，您可以在同一个解决方案中使用它们。尽管你需要注意你的代码是符合CLS的。这意味着您一定没有使用过其他语言无法理解的功能/特性。例如，VB不理解无符号整数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3096310|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

No, not in the same project.but you can use them in the same solution.
though you need to take care that your code is CLS compliant. That means you must not have used such functionality/feature that is not understand by other language. For example VB does not understand unsigned ints.

blocks|key|336778|text|可以，您可以在网站中添加这两个文件only.If项目是一个web应用程序，它不允许不同类型的文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|336779|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Yes, You can add both of the file in web site only.If the project is a web application it will not allow different type of file.

blocks|key|3309197|text|在项目上单击鼠标右键。选择Add+Asp.Net+Folder。在该文件夹下，创建两个文件夹，一个名为VBCodeFiles，另一个在Web.Config中的CSCodeFiles中，在compilation下添加一个新元素|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3309198|<compilation+debug="true"+targetFramework="4.5.1">
++++++<codeSubDirectories>
++++++++<add+directoryName="VBCodeFiles"/>
++++++++<add+directoryName="CSCodeFiles"/>
++++++</codeSubDirectories>
</compilation>|code-block|syntax|javascript|3309199|现在创建一个cshtml页面。使用以下命令添加对VBCodeFiles.Namespace.MyClassName的引用|3309200|@using+DMH.VBCodeFiles.Utils.RCMHD
@model+MyClassname|3309201|其中MyClassName是在上面的命名空间中找到的类对象。现在使用cshtml文件在razor中写出对象。|3309202|@Model.FirstName|3309203|请注意，如果这是一个C#项目，则directoryName="CSCodeFiles“是多余的；如果这是一个VB.Net项目，则directoryName="VBCodeFiles”是多余的。|3309204|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Right-click the Project. Choose Add Asp.Net Folder.
Under The Folder, create two folders one named VBCodeFiles and the Other CSCodeFiles
In Web.Config add a new element under compilation

<pre><code>&lt;compilation debug="true" targetFramework="4.5.1"&gt;
 &lt;codeSubDirectories&gt;
 &lt;add directoryName="VBCodeFiles"/&gt;
 &lt;add directoryName="CSCodeFiles"/&gt;
 &lt;/codeSubDirectories&gt;
&lt;/compilation&gt;
</code></pre>

Now, Create an cshtml page.
Add a reference to the VBCodeFiles.Namespace.MyClassName using

<pre><code>@using DMH.VBCodeFiles.Utils.RCMHD
@model MyClassname
</code></pre>

Where MyClassName is an class object found in the namespace above.
now write out the object in razor using a cshtml file.

<pre><code>&lt;p&gt;@Model.FirstName&lt;/p&gt;
</code></pre>

Please note, the directoryName="CSCodeFiles" is redundant if this is a C# Project and the directoryName="VBCodeFiles" is redundant if this is a VB.Net project.

blocks|key|334442|text|是的，它将possible.adding、c#和vb.net集成到一个解决方案中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|334443|step1:文件->添加->现有项目|334444|Step2:项目->添加引用->您之前添加的项目的dll或exe。|334445|step3:在vb.net表单中，您需要使用c#+forms->导入项目的命名空间。|334446|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Yes its possible.adding c# and vb.net projects into a single solution.

step1: File->Add->Existing Project 

Step2: Project->Add reference->dll or exe of project which u added before.

step3: In vb.net form where u want to use c# forms->import namespace of project.

blocks|key|331733|text|在我们的场景中，它是单个解决方案中的单个VB.NET项目(Windows+Desktop应用程序)。然而，我们想要利用VB.NET中的C#特性，如带符号/无符号整数、XML文本和字符串特性，因此根据这些特性，我们在运行时构建代码文件，使用各自的Rosalyn编译器(VB/CS)编译成DLL，并动态加载到当前程序集中。当然，我们不得不做动态DLL的脱钩、卸载、重载、命名等工作，而内存管理主要是使用动态GUID来命名，以避免冲突。它工作得很好，应用程序用户可以从我们的桌面应用程序连接到任何数据库，编写SQL查询，转换连接到LINQ连接和编写LINQ查询，所有这些都需要动态构建源代码，编译成DLL并附加到当前程序集。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|331734|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In our scenario, its a single VB.NET project (Windows Desktop application) in a single solution. However we wanted to take advantage of C# features like signed/unsigned integers and XML literals and string features in VB.NET. So depending on the features, at runtime we build the code file, compile using respective Rosalyn compiler (VB/CS) into DLL and dynamically load into current assembly. Of course we had to work on delinking, unloading, reloading, naming etc of the dynamic DLLs and the memory management were we largely used dynamic GUID for naming to avoid conflict.
It works fine where app user may connect to any DB from our desktop app, write SQL query, convert the connection to LINQ connection and write LINQ queries too which all requires dynamic building of source code, compiling into DLL and attaching to current assembly.

Can you mix vb and c# files in the same project for a class library? Is there some setting that makes it possible?

I tried and none of the intellisense works quite right, although the background compiler seems to handle it well enough (aside from the fact that I, then, had 2 classes in the same namespace with the same name and it didn't complain). 

We're trying to convert from VB to C# but haven't finished converting all the code. I have some new code I need to write, but didn't really want to make a new project just for it.

Mixing C# & VB In The Same Project

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Windows

你可以在一个类库的同一项目中混合使用vb和c#文件吗？有没有一些设置可以让它成为可能？我试过了，没有一个intellisense能很好地工作，尽管后台编译器似乎能很好地处理它(除了我在同一个名称空间中有两个同名的类，而且它没有抱怨)。我们正在尝试从VB转换到C#，但是还没有完成所有代码的转换。我有一些新的代码需要写，但...

问在同一项目中混合使用C#和VB
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