WPFMaterialDataGridStyleWithHeader.xaml

    <Style TargetType="DataGrid">
        <!-- Make the border and grid lines a little less imposing -->
        <Setter Property="FontFamily" Value="Google Sans" ></Setter>
        <Setter Property="BorderBrush" Value="#DDDDDD" />
        <Setter Property="HorizontalGridLinesBrush" Value="#DDDDDD" />
        <Setter Property="VerticalGridLinesBrush" Value="#DDDDDD" />
        <Setter Property="RowHeight" Value="25"></Setter>
        <Setter Property="RowStyle">
            <Setter.Value>
                <Style TargetType="DataGridRow">
                    <Style.Triggers>
                        <!-- Highlight a grid row as the mouse passes over -->
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Background" Value="LightCyan" />
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Setter.Value>
        </Setter>
        <Setter Property="CellStyle">
            <Setter.Value>
                <Style TargetType="DataGridCell">
                    <Style.Triggers>
                        <!-- Highlight selected rows -->
                        <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Background" Value="#ff66aaff" />
                            <Setter Property="BorderBrush" Value="Transparent" />
                            <Setter Property="Foreground" Value="White" />
                        </Trigger>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter Property="Background" Value="#ff6691ff" />
                            <Setter Property="BorderBrush" Value="Black" />
                            <Setter Property="BorderThickness" Value="0"/>
                            <Setter Property="Foreground" Value="White" />
                        </Trigger>
                    </Style.Triggers>
                    <!-- Add some padding around the contents of a cell -->
                    <Setter Property="Padding" Value="4,3,4,3" />
                    <Setter Property="BorderBrush" Value="Transparent"/>
                    <Setter Property="BorderThickness" Value="0"/>
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="DataGridCell">
                                <Border Padding="{TemplateBinding Padding}" 
                                            BorderBrush="{TemplateBinding BorderBrush}"
                                            BorderThickness="{TemplateBinding BorderThickness}"
                                            Background="{TemplateBinding Background}">
                                    <ContentPresenter />
                                </Border>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                    <Setter Property="FocusVisualStyle">
                        <Setter.Value>
                            <Style TargetType="Control">
                                <Setter Property="BorderBrush" Value="Transparent" />
                            </Style>
                        </Setter.Value>
                    </Setter>
                </Style>
            </Setter.Value>
        </Setter>
        <Setter Property="ColumnHeaderStyle" Value="{DynamicResource HeaderStyle}"></Setter>
    </Style>

    <Style x:Key="HeaderStyle" TargetType="DataGridColumnHeader">
        <Setter Property="Height" Value="30"></Setter>
        <Setter Property="Background" Value="#60c6cf"></Setter>
        <Setter Property="Foreground" Value="White"></Setter>
        <Setter Property="HorizontalContentAlignment" Value="Center"></Setter>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="FontWeight" Value="DemiBold" ></Setter>
        <Setter Property="FontSize" Value="14" ></Setter>
        <Setter Property="Padding" Value="10,0,10,0" ></Setter>
    </Style>