In WPF the use of implicit data templates without an
x:Key makes it easy to associate a template with a particular type of object. You just set the
DataType property of the
DataTemplate to the corresponding type and the template is then applied automatically to all instances of that particular type.
The Universal Windows Platform (UWP) however has no concept of implicit data templates. Each
DataTemplate that you define in a UWP app must have an
x:Key attribute and it must be set to a
If you want your WPF application to be able to detect and handle key presses even when it is not currently activated or focused on the screen you could implement what is known as global hot keys in Windows.
A global, or system-wide, hot key is a key or a combination of keys that is associated with a particular window, which will receive messages whenever the user presses this key or key combination from anywhere in the system.
If you try you remove an item from an IEnumerable while enumerating it using a foreach loop in C# you will get an InvalidOperationException saying that “Collection was modified; enumeration operation may not execute”.
There may be times when you need to use some type in your application that is not known until runtime. This post will explain what you need to do in order to be able to use such a dynamically loaded type from a dynamically loaded assembly as a generic type parameter when you create an instance of some generic class in your application.
This post provides a code sample on how to implement your own custom authentication and authorization in a WPF application by implementing classes that derive from the IIdentity and IPrincipal interfaces and overriding the application thread’s default identity.