C# code at runtime?

Question

How can I compile raw C# code at runtime? So if I want to add security by removing important pieces of code and downloading it via a server, and then execute it from within my application?

Yes, that's exactly what I mean. – Nahydrin Jul 05 '11 at 05:10 — Nahydrin, Jul 05 '11 at 05:10

score 0 · Answer 1 · answered Jul 05 '11 at 05:08

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I wrote this a while ago to simplify code execution, hope it helps:

CSharpCompiler

answered Jul 05 '11 at 05:08

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score 0 · Accepted Answer · edited May 23 '17 at 11:58

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Do you want to download the source code, or a compiled version?

You can download the MSIL and use Assembly.Load(byte[]) to load it for execution.

But none of these methods add security. If you send the code to the user's computer in ANY format, they can capture a copy. Never saving it to disk just adds a small speedbump.

See: The #1 law of software licensing.

edited May 23 '17 at 11:58

Community

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answered Jul 05 '11 at 05:10

Ben Voigt

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The downloaded source code is encrypted. It's an online-only program, so the inconveneice will always be there. – Nahydrin Jul 05 '11 at 05:21
@Dark: Doesn't really matter, since the decryption keys are on the user's computer. Just another speedbump, no real security. – Ben Voigt Jul 05 '11 at 05:29
@Dark: Anyway, why send source code, when you can encrypt and send the MSIL output from the C# compiler? – Ben Voigt Jul 05 '11 at 05:41
Because I don't know how to do that. – Nahydrin Jul 05 '11 at 05:57
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@Dark: Just build a DLL project. Send that file, when you decrypt it on the receiving side, instead of writing it to disk, call `Assembly.Load(byte[])`. – Ben Voigt Jul 05 '11 at 06:25

C# code at runtime?

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