wpf StaticResource to c# behind code

This is my XAML Code

<Window.Resources><ResourceDictionary><Style x:Key="LastRowHighlighted"
                    BasedOn="{StaticResource {dxgt:GridRowThemeKey ResourceKey=RowStyle}}"
                    TargetType="{x:Type dxg:GridRowContent}"></Style></ResourceDictionary></Window.Resources>

its similar behind c# code  is

Binding _Binding = new Binding();
_Binding.Converter = new LastRowHighlighter();

Setter _Setter = new Setter();
_Setter.Property = GridRowContent.FontWeightProperty;
_Setter.Value = _Binding;
            
Style _Style = new System.Windows.Style();
//_Style.BasedOn = new Style(typeof(GridRowContent));
_Style.TargetType = typeof(GridRowContent);
_Style.Setters.Add(_Setter);

grid.Resources.Add("LastRowHighlighted", _Style);

i do not know how can i replace
BasedOn="{StaticResource {dxgt:GridRowThemeKey ResourceKey=RowStyle}}"
with c# code