Unhandled Exception in XAML - How to solve?

Please help me to understand the problem and solve this: this http://img689.yfrog.com/img689/5357/errornj.jpg Thanks !开发者_运维知识库

It looks like an assembly is missing, it may be Microsoft.Expression.Interactions or something that assembly itself needs. It could also be the required version or public key token is incorrect.

If it executes OK, but you cannot see the library at design-time, I wonder if it's because the dll is 'locked'?

I had exactly this problem here

You are trying to access a control or trigger that does not exist, from xaml.

try removing the assembly and its footprint from app.config if there is one and try adding the library again. also check from the project props that you are targeting the correct framwork version...