How to: Use an Assembly from the Web in Visual Studio

My machine configuration is Windows 7 Service Pack 1.  As suggested in this thread, I opened the file
"C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe.config" and added the following lines
<runtime>
  <loadFromRemoteSources enabled="true" />
  ....
</runtime>
 and it resolved the issue for me. All other options - "unlock button", "Moving the assembly to different folder" -- did not work

Jagan

I had the problems other describe, and I also didn't see the unblock button on the offending dll. Moving my project to a folder outside my Documents folder resolved the issue for me. I use c:\myprojects\ instead of c:\users\<user>\Documents\Visual Studio 2010\Projects

I receive this error in the xaml designer for a assembly not loaded from the web....

The assembly is a project reference and it used to run until ...(what?)

(I'm working on a server terminal and our admins made some changes on the dns server, maybe that's the reason?)

The project can be built and runs properly. Designing the gui is no more possible... :-(

This solution won't work if the file is read-only. You have to make it writable to change this proerty even if the binary won't be altered by this operation.

Many solutions here: http://superuser.com/questions/38476/this-file-came-from-another-computer-how-can-i-unblock-all-the-files-in-a

I was able to add a reference to the project, but when I try to add the XAML namespace I get an error: 

Error 1 Unable to load the metadata for assembly 'WPFToolkit.Extended'. This assembly may have been downloaded from the web.  See http://go.microsoft.com/fwlink/?LinkId=179545.  The following error was encountered during load: Could not load file or assembly 'WPFToolkit.Extended, Version=1.3.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515) 

The link points to this article. The "Unblock" button is not present on the Properties dialog.

I have to create this key to disable strong name verification because the assembly I was trying to load also was not strong name signed. To disable strong name verification, create the following registry keys: HKLM\Software\Wow6432Node\Microsoft\StrongName\Verification\*,*

as well as this one: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\StrongName\Verification\*,*

Note that you are totally opening up your system by doing this, so be WARNED that any assembly is get loaded and you will not be warned if it is evil or not!!

My intended reference is put on a network drive, where SourceSafe points at. It it not possible to use this reference and the error message leads to this page. But this is not the right solution for my problem! Silverlight 4, Windows 7/64, VS 2010.

Peter

This fixed my issue as someone posted above

Open devenv.exe.config (in C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE on my machine), and add this
<runtime>
  <loadFromRemoteSources enabled="true" />
  ....
</runtime>
Restart Visual Studio and it should work.


My zip had no unblock button and neither did the assembly's I was trying to load.

this fixed it for me:
Open devenv.exe.config (in C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE on my machine), and add this
<runtime>
  <loadFromRemoteSources enabled="true" />
  ....
</runtime>
Restart Visual Studio and it should work.

One other thing to look into if you are having this problem is to make sure Visual Studio is not building your solution in your My Documents area.  If so, try moving it to another directory on your computer (e.g. C:\Dev) and rebuild. 

The UNC is a trusted Local Intranet path. There is no "Unlock" button because the file wasn't downloaded from the web. I don't want to use a local reference because then the build server will not be able to find the reference. This only seems to be a problem for the Silverlight project.

For Windows 7, 
1. Right click on the zip file
2. Click on 'Properties'
3. Choose 'Unblock' in the 'Attributes' section
4. Extract file

Note: If you unzip the file before unblocking, all files in the extracted folder are flagged as unsafe.

Not seeing an Unblock button in Windows 7 64-bit.  Trying to do this for the Ribbon library for WPF.

There are two problems both show you this error message.

First)
If your project files reside on a network drive, then move it to a local drive.
You can vote for a solution here: https://connect.microsoft.com/VisualStudio/feedback/details/568464/wpf-project-on-a-network-share-with-clr-namespace?wa=wsignin1.0
I think Kellen run into this problem

Second)
If you download a zip file with source code, then don't open the file directly! First save it on a local drive, then open the folder of the file and there you have to unblock the zip file. Otherwise all the files inside the zip file get the unsafe attribute and need to be unblocked when you extract them!

Could you possibly make protecting us any more painful -- I'm only groaning aloud at this point? There is no one thing marked "assembly". The unblock button is found on the properties page for each individual item, not on a directory.  It's not clear from the write-up if I download an author's code samples for a 1200 page book I purchased from Amazon, do I have to do this for each item in each subdirectory as well (bin -> release, bin -> debug, obj, etc.)? What an enchanting way to learn a new language.

Windows 7.   It's been very difficult getting any Silverlight examples working.
This one is Microsoft.Maps.MapControl.Common.dll.   Worked great when the guy
demoed it at codecamp.  Sure wish I could get it working!
I even downloaded the .msi and installed it local.  No luck.

There is no 'unblock' button that I've seen.  I've run into this problem multiple times, typically from Microsoft sample applications.  Is there a command line utility or something similar that we could use to 'unblock' this assembly?  This is on windows server 2008 r2.