.Net, Troubleshooting, Visual Studio

How To Fix “no exports were found that match the constraint” In Visual Studio

So, you have that “no exports were found that match the constraint” message in Visual Studio, eh?

The first thing I would try doing on the affected version of visual studio is to go to programs and features, select the version and pick change: VSbugss3

When that loads let it repair. Once it does see if that resolves the issue.


If it does not a more manual method that is to delete all of the contents of the ComponentModelCache folder from the following area (of which VS version is affected):

Put your username in the path:

VS 2012:


VS 2013:


VS 2015:


It should look something like:


If that fails there is also a patch that they released in response: https://www.microsoft.com/en-in/download/confirmation.aspx?id=36020#

Certificates, OpenSSL, Windows

Create .pem/.key/.crt Files from a .pfx Certificate Using OpenSSL on Windows

  1. First off, go and get OpenSSL:

Now that you are installed and ready to go you should now have a browsable file path to OpenSSL (i.e. C:\OpenSSL)

2. Obtain your PFX file and (for simplicity) place your PFX file in your OpenSSL directory.

(In this example we will assume we have a .pfx file called mycertificate.pfx and your OpenSSL directory is C:\OpenSSL)

3. Run this in command prompt (in your OpenSSL directory) to get the .pem file:

openssl pkcs12 -in mycertificate.pfx -out mypemfile.pem

You should now have a .pem file generated from your PFX file.

4. Run this in command prompt (in your OpenSSL directory) to extract the encrypted private key:

openssl pkcs12 -in mypemfile.pem -out myencryptedkey.key

You should now have the extracted encrypted private key out of the .pem file.

5. Run this in command prompt (in your OpenSSL directory) to create a decrypted private key from the encrypted version

openssl rsa -in myencryptedkey.key -out mydecryptedkey.key

You should now have the decrypted private key from your encrypted version.

6. Run this in command prompt (in your OpenSSL directory) to extract a .crt file from your PFX file:

openssl pkcs12 -in mycertificate.pfx -clcerts -nokeys -out certificate.crt

You should now an extracted .crt file from the PFX file.

That’s it! You should now have encrypted/decrypted keys as well as your .pem and .crt versions of your original PFX files. Happy certificating (I need to coin that term). Questions are always welcome.