WPF Dependency property crashes in GUI by using my interface?

The invocation of the constructor on type ... that matches the specified binding constraints threw an exception.

The invocation of the constructor on type ... that matches the specified binding constraints threw an exception" This error typically means that there was a runtime error parsing the xaml code. Which of course doesn't tell you much. So you need to get more information.

Basically the exception that you are seeing is just a general error, we want to see what lead up to this problem. To get the real exception (or what we call the 'inner exception'): - activate the catching of all exceptions thrown in Visual Studio. Open Debug > Exceptions and activate the checkbox in the "thrown" column for "Common Language Runtime Exceptions".

Now trigger the crash again, and see what you get. Ideally we want to see the stack trace. If you look in the trace, you will probably see some part of your code being called.

Take a look at this code and see if you can isolate the problem from there. If you are still stuck, then post some code, and the stack trace in your question, and we'll see what we can do from there. Sometimes the 'output' window will also give you some information.

Thousend thanks to you. Now, I have 101 bugs in my application to solve. That will take a lot of time.

Sounds bad? I love to solve such problems at their heart. Thanks for the tipp.

I hope this way, I will find a solution. – goldengel Apr 27 at 8:25.

That usually happens when default value's type is not identical to dependency property's type. E.g. 0 instead of 0.0 for double, or Color instead of Brush.

Also can be caused by using non assigned (null) property in constructor.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.