Index: Core/Common/src/Core.Common.Controls.TreeView/TreeNodeInfo.cs
===================================================================
diff -u -r7022a5fcf668ebe36c390563d5ed82ca4c0fc016 -r778cb6e89f676cb60f95da71d7aed9d5b355ed2e
--- Core/Common/src/Core.Common.Controls.TreeView/TreeNodeInfo.cs	(.../TreeNodeInfo.cs)	(revision 7022a5fcf668ebe36c390563d5ed82ca4c0fc016)
+++ Core/Common/src/Core.Common.Controls.TreeView/TreeNodeInfo.cs	(.../TreeNodeInfo.cs)	(revision 778cb6e89f676cb60f95da71d7aed9d5b355ed2e)
@@ -160,7 +160,7 @@
         /// Gets or sets a function for obtaining the tree node foreground color.
         /// The <typeparamref name="TData"/> parameter represents the wrapped data of the tree node.
         /// </summary>
-        public Func<object, Color> ForegroundColor { get; set; }
+        public Func<TData, Color> ForegroundColor { get; set; }
 
         /// <summary>
         /// Gets or sets a function for obtaining the tree node image.
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs
===================================================================
diff -u -r7022a5fcf668ebe36c390563d5ed82ca4c0fc016 -r778cb6e89f676cb60f95da71d7aed9d5b355ed2e
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 7022a5fcf668ebe36c390563d5ed82ca4c0fc016)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 778cb6e89f676cb60f95da71d7aed9d5b355ed2e)
@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using System.Windows.Forms;
 using Core.Common.Controls.TreeView;
@@ -112,6 +113,112 @@
                 CanInsert = PipingCalculationGroupContextCanInsert,
                 OnDrop = PipingCalculationGroupContextOnDrop
             };
+
+            yield return new TreeNodeInfo<PipingInputContext>
+            {
+                Text = pipingInputContext => PipingFormsResources.PipingInputContextNodePresenter_NodeDisplayName,
+                Image = pipingInputContext => PipingFormsResources.PipingInputIcon,
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddImportItem()
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<IEnumerable<RingtoetsPipingSurfaceLine>>
+            {
+                Text = ringtoetsPipingSurfaceLine => PipingFormsResources.PipingSurfaceLinesCollection_DisplayName,
+                Image = ringtoetsPipingSurfaceLine => PipingFormsResources.FolderIcon,
+                ForegroundColor = ringtoetsPipingSurfaceLine => ringtoetsPipingSurfaceLine.Any() ? Color.FromKnownColor(KnownColor.ControlText) : Color.FromKnownColor(KnownColor.GrayText),
+                ChildNodeObjects = ringtoetsPipingSurfaceLine => ringtoetsPipingSurfaceLine.Cast<object>().ToArray(),
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddImportItem()
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddExpandAllItem()
+                                                     .AddCollapseAllItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<RingtoetsPipingSurfaceLine>
+            {
+                Text = pipingSurfaceLine => pipingSurfaceLine.Name,
+                Image = pipingSurfaceLine => PipingFormsResources.PipingSurfaceLineIcon,
+
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<IEnumerable<PipingSoilProfile>>
+            {
+                Text = pipingSoilProfiles => PipingFormsResources.PipingSoilProfilesCollection_DisplayName,
+                Image = pipingSoilProfiles => PipingFormsResources.FolderIcon,
+                ForegroundColor = pipingSoilProfiles => pipingSoilProfiles.Any() ? Color.FromKnownColor(KnownColor.ControlText) : Color.FromKnownColor(KnownColor.GrayText),
+                ChildNodeObjects = pipingSoilProfiles => pipingSoilProfiles.Cast<object>().ToArray(),
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddImportItem()
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddExpandAllItem()
+                                                     .AddCollapseAllItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<PipingSoilProfile>
+            {
+                Text = pipingSoilProfile => pipingSoilProfile.Name,
+                Image = pipingSoilProfile => PipingFormsResources.PipingSoilProfileIcon,
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<PipingOutput>
+            {
+                Text = pipingOutput => PipingFormsResources.PipingOutput_DisplayName,
+                Image = pipingOutput => PipingFormsResources.PipingOutputIcon,
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<EmptyPipingOutput>
+            {
+                Text = emptyPipingOutput => PipingFormsResources.PipingOutput_DisplayName,
+                Image = emptyPipingOutput => PipingFormsResources.PipingOutputIcon,
+                ForegroundColor = emptyPipingOutput => Color.FromKnownColor(KnownColor.GrayText),
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
+
+            yield return new TreeNodeInfo<EmptyPipingCalculationReport>
+            {
+                Text = emptyPipingCalculationReport => PipingDataResources.CalculationReport_DisplayName,
+                Image = emptyPipingCalculationReport => PipingFormsResources.PipingCalculationReportIcon,
+                ForegroundColor = emptyPipingCalculationReport => Color.FromKnownColor(KnownColor.GrayText),
+                ContextMenu = (nodeData, node) => Gui.ContextMenuProvider
+                                                     .Get(node)
+                                                     .AddOpenItem()
+                                                     .AddSeparator()
+                                                     .AddExportItem()
+                                                     .AddSeparator()
+                                                     .AddPropertiesItem()
+                                                     .Build()
+            };
         }
 
         # region PipingFailureMechanism TreeNodeInfo