Build a .NET dll to WP7

Question

How can I port a C# dll to WP7?

I have the .dll source code successfully building on desktop but when I try to reference the dll on a WP7 project I get the following

Answer 1

You might also want to take a look at the Portable Class Libraries stuff from Microsoft - http://msdn.microsoft.com/en-us/library/gg597391.aspx - which allows you to compile a DLL up to work for WP7, Silverlight, .Net Framework or XBOX360

I have used it for a .Net WCF service and WP7 projects to share a common DLL.

There are a few things to look out for, in that there are some unsupported assemblies, but in the whole it covers most of what is needed.

Answer 2

Create a Windows Phone Library project, copy source codes to it and resolve all errors that appears. And than you can reference this dll from Windows Phone project