public partial class MainPage : Page

{

    public MainPage()

    {

        this.fxgantt.BeforeOverlappingSet += fxgantt_BeforeOverlappingSet;

    }

    void fxgantt_BeforeOverlappingSet(object sender, FlexyGantt.BeforeOverlappingSetEventArgs e)

    {

        // cancels overlapped tasks event

        // Here, Task named 'Victor's Task' is not considered as overlapped.

        var taskName = (e.Entity1.DataContext as Task).TaskName;

        if (taskName == "Victor's Task")

            e.IsOverlapped = false;

    }

}