Red border remains on the TextBox even after the data input is valid

Question

I am writing an app using WPF, WPF Application Framework and MahApps.Metro. I have validation enabled for a data entry window like this:

Answer 1

I've come across this before, when it happened to me I had to perform a data change during initialize and ContentRendered. Cause I had the items actually bound.

Another thing I saw awhile ago on Stack Overflow was an issue that happened here that also caused something similar.

That was my encounter, if that doesn't help I'll attempt to recreate the issue and fix as well. See if I can help you out a little better then describing how I fixed it. But hopefully one of those two suggestions helps you out.

Just let me know, hope it helps.