Fixed some comments and types.

NTwain/Triplets/DGControl/DGControl.Capability.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.Capability"/>.
+    /// </summary>
 	public sealed class Capability : OpBase
 	{
 		internal Capability(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.CustomDSData.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.CustomDSData"/>.
+    /// </summary>
 	public sealed class CustomDSData : OpBase
 	{
 		internal CustomDSData(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.DeviceEvent.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.DeviceEvent"/>.
+    /// </summary>
 	public sealed class DeviceEvent : OpBase
 	{
 		internal DeviceEvent(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.EntryPoint.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.EntryPoint"/>.
+    /// </summary>
 	sealed class EntryPoint : OpBase
 	{
 		internal EntryPoint(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.FileSystem.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.FileSystem"/>.
+    /// </summary>
 	public sealed class FileSystem : OpBase
 	{
 		internal FileSystem(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.Identity.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.Identity"/>.
+    /// </summary>
 	public sealed class Identity : OpBase
 	{
 		internal Identity(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.Parent.cs

@@ -5,6 +5,9 @@ using System.Runtime.InteropServices;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.Parent"/>.
+    /// </summary>
     sealed class Parent : OpBase
     {
         internal Parent(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.PassThru.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.PassThru"/>.
+    /// </summary>
 	public sealed class PassThru : OpBase
 	{
 		internal PassThru(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.PendingXfers.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.PendingXfers"/>.
+    /// </summary>
 	sealed class PendingXfers : OpBase
 	{
 		internal PendingXfers(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.SetupFileXfer.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.SetupFileXfer"/>.
+    /// </summary>
 	public sealed class SetupFileXfer : OpBase
 	{
 		internal SetupFileXfer(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.SetupMemXfer.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.SetupMemXfer"/>.
+    /// </summary>
 	public sealed class SetupMemXfer : OpBase
 	{
 		internal SetupMemXfer(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.Status.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.Status"/>.
+    /// </summary>
 	public sealed class Status : OpBase
 	{
 		internal Status(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.StatusUtf8.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.StatusUtf8"/>.
+    /// </summary>
 	public sealed class StatusUtf8 : OpBase
 	{
 		internal StatusUtf8(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.UserInterface.cs

@@ -4,6 +4,9 @@ using System;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.UserInterface"/>.
+    /// </summary>
     sealed class UserInterface : OpBase
     {
         internal UserInterface(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.XferGroup.cs

@@ -4,6 +4,9 @@ using NTwain.Values;
 
 namespace NTwain.Triplets
 {
+    /// <summary>
+    /// Represents <see cref="DataArgumentType.XferGroup"/>.
+    /// </summary>
 	public sealed class XferGroup : OpBase
 	{
 		internal XferGroup(ITwainSessionInternal session) : base(session) { }

NTwain/Triplets/DGControl/DGControl.cs

@@ -1,8 +1,9 @@
-using System;
+using NTwain.Values;
+using System;
 namespace NTwain.Triplets
 {
-	/// <summary>
-	/// Class for grouping triplet operations under the Control data group.
+    /// <summary>
+    /// Represents <see cref="DataGroups.Control"/>.
 	/// </summary>
 	public sealed class DGControl
 	{