MSHTML DLL on Windows 10

Question

I have a C# solution that makes use of Smith Html Editor (I\'m developing on the main project which uses this, so I don\'t know much about this library), which makes a refer

Answer 1

I had the exact same problem. Adding the c:\windows\system32\mshtml.tlb worked. Note it's NOT the dll, but the tlb. Thank you so much for asking this question and thank you Hans, for the answer :)

Answer 2

I had the same issue and I think what's going on, at least in my case, is that the project was originally a VS2012 project on Windows 7 and there was a primary interop assembly installed that was referenced. When I removed and re-added the reference to MSHTML and did a diff on the files, the only difference was that the <WrapperTool> was changed from primary to tlbimp and <EmbedInteropTypes> was changed from false to true.

At some point, Visual Studio added the ability to embed the COM wrappers directly into the assembly instead of referencing PIAs, so my guess is that a new VS2015 installation on Windows 10 no longer installs PIAs because they're not necessary. So that's why removing and re-adding the reference fixes the problem and the project should continue to build fine on older OS as well.