Unknown extern method T System.Nullable`1::get_Value() <p>I've run into a problem with my dot42 C# project:</p> <pre><code>Unknown extern method T System.Nullable`1::get_Value() at System.Void NokiaStyleProfiles.AddDialogue::btnAdd_Click(System.Object,System.EventArgs) (c:\Users\STO\Documents\Visual Studio 2012\Projects\NokiaStyleProfiles\NokiaStyleProfiles\AddDialogue.cs, position 86,13) </code></pre> <p>Code that's causing that problem:</p> <pre><code>int hourStart = timePickerStart.CurrentHour.Value; (timePicker.CurrentHour is an int?) </code></pre> <p><code>(int)</code>, <code>.Value</code> and <code>.GetValueOrDefault()</code>, as expected, produce the same result : this error.</p> <p>How can i fix it?</p>