Question

What I Do
create a user control which one of its DependencyProperty binds to a string array

    public static readonly DependencyProperty TaskListProperty =
    DependencyProperty.Register("TaskList",
                                typeof(string[]),
                                typeof(MainControl),
                                null);

    public string TaskList
    {
        get { return (string[])GetValue(TaskListProperty); }
        set { SetValue(TaskListProperty, value); }
    }

What I got
a error for this code

    get { return (string[])GetValue(TaskListProperty); }

Error:Cannot implicitly convert type ‘string[]’ to ‘string’

How
Why does this error happen, don’t I register its type of source to string array? How to solve it?

Answer 1

The error message is right. You forgot the [] for your property type.

public string[] TaskList
{
    get { return (string[])GetValue(TaskListProperty); }
    set { SetValue(TaskListProperty, value); }
}