getting runtime error assembly 'System.Runtime' while using CSharpCodeProvider

Question

I'm getting runtime error about missing reference.

The type 'System.Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

I'm using MVC application and used CSharpCodeProvider inside my code.

I do not get any compile error but getting runtime error for compileResult as above why?

 CompilerResults results = provider.CompileAssemblyFromSource(parameters, code);

I even added assemblies tag in web.cofig like following still same error.any clue why?

  <assemblies>     
    <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />   
  </assemblies>

Have you explicitly added the reference to the assembly? Removed and re-added? — Grant Thomas
– Grant Thomas, Commented Jul 1, 2015 at 10:34
Please see this link stackoverflow.com/questions/20660999/… This should resolve your problem — Chander .k
– Chander .k, Commented Jul 1, 2015 at 10:41
@Chander.k unable to get this answer ? can you specifically elaborate for my problem ? — Neo
– Neo, Commented Jul 1, 2015 at 10:43

Patrick Hofman · Accepted Answer · 2015-07-01 10:35:19Z

2

ASP.NET MVC uses the dynamic keyword a lot. That may be the original of the problem, since that requires both the Microsoft.CSharp assembly (which you have obviously included) and the System.Runtime assembly (I think this one is missing.

Add the System.Runtime assembly in your compile config:

parameters.ReferencedAssemblies.Add("mscorlib.dll"); // guess you have this one already
parameters.ReferencedAssemblies.Add("System.Runtime.dll");

answered Jul 1, 2015 at 10:35

Patrick Hofman

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5 Comments

Neo Over a year ago

this resolved my specific system runtime dll error but i wonder why this is not resolved when I have added it in web.config?

Patrick Hofman Over a year ago

Because compiling the code has nothing to do with your currently running code. You need to tell the compiler how to compile.

Neo Over a year ago

that is why it does not read it from web.config you mean to say?

Patrick Hofman Over a year ago

Indeed. Why should it? What if you want to compile for another version of the assembly?

Neo Over a year ago

cool great thanks a lot, actually everywhere only web.config tag solution is given thanks :)

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