I'm using WPF 21.2. Using other topics on the forum and web I have been able to create an unbound field that presents a delete button for the record.

<Window x:Class="DeleteRecordFieldApp.MainWindow"
				xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
				xmlns:igDP="http://infragistics.com/DataPresenter"
				xmlns:igThemes="http://infragistics.com/Themes"
				xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
				xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
				xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
				xmlns:local="clr-namespace:DeleteRecordFieldApp"
				mc:Ignorable="d"
				Title="MainWindow"
				Height="450"
				Width="800">
	<Window.Resources>
		<ResourceDictionary>
			<DrawingImage x:Key="DeleteIcon">
				<DrawingImage.Drawing>
					<GeometryDrawing>
						<GeometryDrawing.Geometry>
							<GeometryGroup>
								<LineGeometry StartPoint="10,10"
															EndPoint="90,90" />
								<LineGeometry StartPoint="10,90"
															EndPoint="90,10" />
							</GeometryGroup>
						</GeometryDrawing.Geometry>
						<GeometryDrawing.Pen>
							<Pen Thickness="20"
									 Brush="Black" />
						</GeometryDrawing.Pen>
					</GeometryDrawing>
				</DrawingImage.Drawing>
			</DrawingImage>

			<Style x:Key="DeleteButtonStyle"
						 TargetType="{x:Type igDP:CellValuePresenter}"
						 BasedOn="{x:Static igThemes:DataPresenterOffice2013.CellValuePresenter}">
				<Setter Property="Visibility"
								Value="Hidden" />
				<Setter Property="Opacity"
								Value="0.3" />
				<Setter Property="Template">
					<Setter.Value>
						<ControlTemplate>
							<Image Source="{StaticResource DeleteIcon}"
										 HorizontalAlignment="Center"
										 Width="10"
										 Height="10"
										 Stretch="Uniform"
										 MouseLeftButtonDown="DeleteRecord"
										 ToolTip="Remove this variable" />
						</ControlTemplate>
					</Setter.Value>
				</Setter>
				<Style.Triggers>
					<MultiDataTrigger>
						<MultiDataTrigger.Conditions>
							<Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type igDP:DataRecordPresenter}}}"
												 Value="True" />
							<Condition Binding="{Binding Path=IsAddRecord}"
												 Value="False" />
						</MultiDataTrigger.Conditions>
						<Setter Property="Visibility"
										Value="Visible" />
					</MultiDataTrigger>
					<DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}"
											 Value="True">
						<Setter Property="Opacity"
										Value="1.0" />
					</DataTrigger>
				</Style.Triggers>
			</Style>
		</ResourceDictionary>
	</Window.Resources>
	<Window.DataContext>
		<local:MyViewModel />
	</Window.DataContext>
	<Grid>
		<Grid.RowDefinitions>
			<RowDefinition Height="*" />
			<RowDefinition Height="*" />
		</Grid.RowDefinitions>

		<igDP:XamDataGrid Grid.Row="0"
											Theme="Office2013"
											Margin="10"
											DataSource="{Binding MyData}"
											VerticalAlignment="Stretch">
			<igDP:XamDataGrid.FieldLayouts>
				<igDP:FieldLayout>
					<igDP:FieldLayout.Settings>
						<igDP:FieldLayoutSettings AutoGenerateFields="False"
																			AllowAddNew="True"
																			AddNewRecordLocation="OnBottom" />
					</igDP:FieldLayout.Settings>
					<igDP:TextField Label="Label"
													Name="Label"
													Width="*">
					</igDP:TextField>
					<igDP:Field Name="deleteField"
											BindingType="Unbound"
											IsEnabledInAddRecord="False">
						<igDP:Field.Settings>
							<igDP:FieldSettings AllowResize="False"
																	AllowGroupBy="False"
																	AllowRecordFiltering="False"
																	AllowSummaries="False"
																	CellWidth="20"
																	LabelWidth="20"
																	CellValuePresenterStyle="{StaticResource DeleteButtonStyle}" />
						</igDP:Field.Settings>
					</igDP:Field>
				</igDP:FieldLayout>
			</igDP:XamDataGrid.FieldLayouts>
		</igDP:XamDataGrid>

		<igDP:XamDataGrid Grid.Row="1"
											Theme="Office2013"
											Margin="10"
											DataSource="{Binding MyData}"
											VerticalAlignment="Stretch">
			<igDP:XamDataGrid.FieldLayouts>
				<igDP:FieldLayout>
					<igDP:FieldLayout.Settings>
						<igDP:FieldLayoutSettings AutoGenerateFields="False"
																			AllowAddNew="True"
																			AddNewRecordLocation="OnBottom" />
					</igDP:FieldLayout.Settings>
					<igDP:TextField Label="Label"
													Name="Label"
													Width="*">
					</igDP:TextField>
					<local:DeleteRecordField Name="DeleteRecord" />
				</igDP:FieldLayout>
			</igDP:XamDataGrid.FieldLayouts>
		</igDP:XamDataGrid>
	</Grid>
</Window>

I would like to abstract it all into a reusable class like you see in the second XamDataGrid. I've created the class and the Default.xaml, but I am getting something wrong and wondering if anyone can help out.DeleteRecordFieldApp.zip