问题
So I found this wonderful library called WatiN - and I've downloaded the latest version - v2.1. I've opened a Console Applications (obviously C#) and wrote my most simplest program:
using WatiN.Core;
...
FireFox browser = new FireFox(@"..");
browser.Button("Send").Click();
browser.Dispose();
It's nothing much.
I obviously added a reference to my project by right-clicking the project > Add Reference > browsed to C:\...\WatiN\bin\net40, chose WatiN.Core.dll (like the Readme said)
The VS was auto completing my typing - and he offered me alternatives (you know - when you type con and he shows that lil' window and showing you Console etc) - like he should, because I've added the reference.
Then I hit compile - and suddenly - VS turns blind and he can't detect the DLL I referenced.
The DLL still shows up in the References folder in my project - but VS whines that it doesn't.
He says: The type or namespace name 'WatiN' does not exist in the namespace 'WatiN' (are you missing an assembly reference?)
Although he did not show those errors before compile - and marked Firefox in green (because its a class).
Can anyone help me with this? Maybe well me whats wrong ?
Another thing - when double clicking the DLL in the reference (aka Object Browser) it shows me it and everything's OK - but after I try to compile - it magically disappears.
回答1:
In your project settings, change your Target Framework from ".NET Framework 4 Client Profile" to ".NET Framework 4". That did the trick for me.
来源：https://stackoverflow.com/questions/6740744/cant-add-a-reference-to-my-project-it-simply-doesnt-detect-it