Visual Studio loses reference when attempting to build

Question

I started using Thrift about a week ago. I got the latest source from SVN and built the C# library (Thrift.dll). I used the library to prototype a TCP client/server with the data types that my team will be using. This worked with no problem, I just followed the example code in the SVN repo.

Yesterday, I wanted to run the same test but over HTTP instead. I searched around online some and found out that from the time I got the code last week until yesterday patch "THRIFT-322" https://issues.apache.org/jira/browse/THRIFT-322

Was applied to the trunk. So I updated my thrift source from SVN and saw the new THttpHandler class. I rebuilt the Thrift.dll so I can use the THttpHandler class but now whenever I reference the new dll Visual Studio 2010 gives me an error at compile time: "The type or namespace "Thrift" could not be found (are you missing a using directive or an assembly reference?)". When I replace the reference with the old Thrift.dll that I have I do not get this error.

I can't figure out what I'm doing wrong, I just recompiled the Thrift.dll from the SVN source and I can no longer link to the Thrift.dll. When I first add the reference it seems like it's going to work fine. Visual Studio gives me the correct intellisense, etc. Once I try to build it's like there is no longer a reference to the Thrift.dll. Any ideas?

I also submitted this to the Thrift Users Mailing List, I just thought maybe this was more general and someone here may be able to help.

Thanks, -Sean

Answer 1

Since you mentioned using VS 2010... I have seen this error/behavior sometimes when I am compiling a .NET 4.0 project and my target framework for the project is set to ".NET Framework 4.0 Client Profile" instead of ".NET Framework 4.0". So you might want to check that and see if it helps.

Answer 2

I had a similar problem I had to switch from '.NET Framework 4.0 Client Profile' to '.NET Framework 4.0' and it worked because a referenced dll is compiled using the '.NET Framework 4.0'