How to change Datagrid Header Background using our custom style and based on MetroColumnHeader?

[ashishbhojani]

[punker76]

@ashishbhojani It's now available with the latest pre-release

            <DataGrid.ColumnHeaderStyle>
                <Style BasedOn="{StaticResource MetroDataGridColumnHeader}" TargetType="{x:Type DataGridColumnHeader}">
                    <Setter Property="Background" Value="Red" />
                    <Style.Triggers>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True" />
                                <Condition Property="SortDirection" Value="{x:Null}" />
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="Yellow" />
                        </MultiTrigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.ColumnHeaderStyle>