Publish web application with unsafe code

Question

I'm trying to publish a web application (with VS2012 Web) in which I need to run a vb script.

That script currently doesn't run correctly probably because of the lack of permissions. I am currently trying to run it as a user and supply some credentials. The password I have to provide must be in a System.Security.SecureString which needs a char* to be created.

When I run my app in debug everything works fine and as expected. But when comes the time to publish the app to the server, it says :

1>C:\SVN\...\Default.aspx.cs(108,21,108,27): error CS0227: Unsafe code may only appear if compiling with /unsafe

I have allowed for unsafe code in the project properties, but I don't know why VS sees that property when debugging and not when publishing.

When I hit publish, I see the CS0227 error in the error list but it stays for only 1 second, then it disappears... It seems like that second is enough to make the build fail.

Any ideas as to what the problem is?

Here is my code :

Process proc = new Process();
ProcessStartInfo psi = new ProcessStartInfo("C:\\Windows\\System32\\cscript.exe", "\"" + scriptPath + "\" " + args);
psi.UseShellExecute = false;
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = true;
psi.CreateNoWindow = true;

psi.Domain = "MyDomain";
psi.UserName = "MyUsername";

System.Security.SecureString hashPwd;

unsafe
{
    // Instantiate a new secure string. 
    fixed (char* pChars = pwd)
    {
        hashPwd = new System.Security.SecureString(pChars, pwd.Length);
    }
}

psi.Password = hashPwd;


//Set the process' start info
proc.StartInfo = psi;

//We start the script.
proc.Start();

Answer 1

It's very simple to publish with a unsafe code

Here is how you do it:

Answer 2

Please add this code in Web.config file and check it is working for you

<compilers>
<compiler language="c#;cs;csharp" extension=".cs" compilerOptions="/unsafe" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</compilers>

Answer 3

It seems when you publish it ignores the project setting of unsafe, so you need to manually open your .CSPROJ file and include:

  <PropertyGroup>
    ...
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

That solved it for me.

Googled this issue but could not find anything. Checked the *.targets files for "unsafe" which led me to the "AllowUnsafeBlocks" tag.