# 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\.

```cpp
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:

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