# V3049. WPF: readonly field of 'DependencyProperty' type is not initialized.

The analyzer detected a possible error related to dependency property registration. A dependency property was defined but wasn't initialized: it will cause an error when trying to access the property using SetValue / GetValue.

    class A : DependencyObject
    {
      public static readonly DependencyProperty CurrentTimeProperty;
      static A(){ /* CurrentTimeProperty not initialized */ }
          ....

Bad refactoring or copy-paste may result in leaving a dependency property unregistered. The following is the fixed version of the code above:

    class A : DependencyObject
    {
    public static readonly DependencyProperty CurrentTimeProperty;
    static A()
    {
      CurrentTimeProperty =
        DependencyProperty.Register("CurrentTime", typeof(DateTime),
                                    typeof(A));
    }
    ....