Breaking Change, change 'BaseGroupedRow' to 'GroupHeader'. Reports can be modified very easy with an TextEditor. Just replace <BaseGroupedRow>' with <GroupHeader>, don't forgott about the closing tag's.

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Project/ReportItems/BaseGroupFooter.cs

@@ -13,7 +13,7 @@ namespace ICSharpCode.Reports.Addin
 	/// <summary>
 	/// Description of BaseGroupFooter.
 	/// </summary>
-	public class GroupFooter:BaseGroupedRow
+	public class GroupFooter:GroupHeader
 	{
 		public GroupFooter()
 		{

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Project/ReportItems/BaseGroupeHeader.cs

@@ -15,11 +15,11 @@ namespace ICSharpCode.Reports.Addin
 	/// Description of GroupedRow.
 	/// </summary>
 	[Designer(typeof(ICSharpCode.Reports.Addin.Designer.GroupedRowDesigner))]
-	public class BaseGroupedRow:BaseRowItem
+	public class GroupHeader:BaseRowItem
 	{
-		public BaseGroupedRow()
+		public GroupHeader()
 		{
-			TypeDescriptor.AddProvider(new GroupedRowTypeProvider(), typeof(BaseGroupedRow));
+			TypeDescriptor.AddProvider(new GroupedRowTypeProvider(), typeof(GroupHeader));
 		}
 		
 		

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Project/ReportWizard/ReportLayout/AbstractLayout.cs

@@ -161,7 +161,7 @@ namespace ICSharpCode.Reports.Addin.ReportWizard
 		
 		#region Grouping
 		
-		protected ICSharpCode.Reports.Core.BaseGroupedRow CreateGroupHeader(Point headerLocation)
+		protected ICSharpCode.Reports.Core.GroupHeader CreateGroupHeader(Point headerLocation)
 		{
 			ICSharpCode.Reports.Core.BaseDataItem dataItem = new ICSharpCode.Reports.Core.BaseDataItem();
 			
@@ -172,7 +172,7 @@ namespace ICSharpCode.Reports.Addin.ReportWizard
 			dataItem.Size = new Size (150,20);
 			dataItem.Text = ReportModel.ReportSettings.GroupColumnsCollection[0].ColumnName;
 			
-			ICSharpCode.Reports.Core.BaseGroupedRow groupHeader = new ICSharpCode.Reports.Core.BaseGroupedRow();
+			ICSharpCode.Reports.Core.GroupHeader groupHeader = new ICSharpCode.Reports.Core.GroupHeader();
 			groupHeader.Location = headerLocation;
 			groupHeader.Size = new Size (300,dataItem.Size.Height + GlobalValues.ControlMargins.Top + GlobalValues.ControlMargins.Bottom);
 			groupHeader.Items.Add(dataItem);

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Project/Toolbox/ToolboxProvider.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.Reports.Addin
 			
 		
 			//GroupHeader
-			tb = new ToolboxItem(typeof(ICSharpCode.Reports.Addin.BaseGroupedRow));
+			tb = new ToolboxItem(typeof(ICSharpCode.Reports.Addin.GroupHeader));
 			tb.Bitmap = WinFormsResourceService.GetBitmap("Icons.16x16.SharpQuery.Table");
 			tb.DisplayName = "GroupHeader";
 			sideTab.Items.Add(new SideTabItemDesigner(tb));

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Test/Wizard/Generators/GenerateListWithGroupFixture.cs

@@ -29,7 +29,7 @@ namespace ICSharpCode.Reports.Addin.Test.Wizard.Generators
 			ICSharpCode.Reports.Core.BaseSection section = this.reportModel.DetailSection;
 			
 			//GroupHeader
-			var c =  new Collection<ICSharpCode.Reports.Core.BaseGroupedRow>(section.Items.OfType<ICSharpCode.Reports.Core.BaseGroupedRow>().ToList());
+			var c =  new Collection<ICSharpCode.Reports.Core.GroupHeader>(section.Items.OfType<ICSharpCode.Reports.Core.GroupHeader>().ToList());
 			Assert.That(c.Count,Is.GreaterThanOrEqualTo(1));
 		}
 		

src/AddIns/Misc/Reports/ICSharpCode.Reports.Addin/Test/Wizard/Generators/GenerateTableWithGrouping.cs

@@ -29,7 +29,7 @@ namespace ICSharpCode.Reports.Addin.Test.Wizard.Generators
 		{
 			ICSharpCode.Reports.Core.BaseTableItem table = CreateContainer();
 			//GroupHeader
-			var c =  new Collection<ICSharpCode.Reports.Core.BaseGroupedRow>(table.Items.OfType<ICSharpCode.Reports.Core.BaseGroupedRow>().ToList());
+			var c =  new Collection<ICSharpCode.Reports.Core.GroupHeader>(table.Items.OfType<ICSharpCode.Reports.Core.GroupHeader>().ToList());
 			Assert.That(c.Count,Is.GreaterThanOrEqualTo(1));
 		}
 		

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/BaseItems/BaseGroupeFooter.cs

@@ -13,7 +13,7 @@ namespace ICSharpCode.Reports.Core
 	/// <summary>
 	/// Description of BaseGroupeFooter.
 	/// </summary>
-	public class GroupFooter:BaseGroupedRow
+	public class GroupFooter:GroupHeader
 	{
 		
 		public GroupFooter()

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/BaseItems/BaseGroupedRow.cs

@@ -8,9 +8,9 @@ namespace ICSharpCode.Reports.Core
 	/// <summary>
 	/// Description of BaseGroupeRow.
 	/// </summary>
-	public class BaseGroupedRow:BaseRowItem
+	public class GroupHeader:BaseRowItem
 	{
-		public BaseGroupedRow():base()
+		public GroupHeader():base()
 		{
 		}
 		

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/Collections/Collections.cs

@@ -152,7 +152,7 @@ namespace ICSharpCode.Reports.Core{
 		public bool IsGrouped
 		{
 			get {
-				return (this[0] is BaseGroupedRow)|| (this[0] is BaseGroupItem) ;
+				return (this[0] is GroupHeader)|| (this[0] is BaseGroupItem) ;
 				//return CreateGroupedList().Count > 0;
 			}
 		}

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/Events/SectionRenderEventArgs.cs

@@ -24,12 +24,12 @@ namespace ICSharpCode.Reports.Core {
 	
 	public class GroupHeaderEventArgs: EventArgs
 	{
-		public GroupHeaderEventArgs (BaseGroupedRow groupHeader)
+		public GroupHeaderEventArgs (GroupHeader groupHeader)
 		{
 			GroupHeader = groupHeader;
 		}
 		
-		public BaseGroupedRow GroupHeader {get; private set;}
+		public GroupHeader GroupHeader {get; private set;}
 		
 	}
 	

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/Exporter/Converters/BaseConverter.cs

@@ -83,7 +83,7 @@ namespace ICSharpCode.Reports.Core.Exporter
 		}
 		
 		
-		protected void FireGroupHeaderRendering (BaseGroupedRow groupHeader)
+		protected void FireGroupHeaderRendering (GroupHeader groupHeader)
 		{
 			GroupHeaderEventArgs ghea = new GroupHeaderEventArgs(groupHeader);
 			EventHelper.Raise<GroupHeaderEventArgs>(GroupHeaderRendering,this,ghea);
@@ -179,9 +179,9 @@ namespace ICSharpCode.Reports.Core.Exporter
 		}
 		
 		
-		protected static Collection<BaseGroupedRow> FindGroupHeader (ISimpleContainer container)
+		protected static Collection<GroupHeader> FindGroupHeader (ISimpleContainer container)
 		{
-			return new Collection<BaseGroupedRow>(container.Items.OfType<BaseGroupedRow>().ToList());
+			return new Collection<GroupHeader>(container.Items.OfType<GroupHeader>().ToList());
 		}
 		
 		

src/AddIns/Misc/Reports/ICSharpCode.Reports.Core/Project/Exporter/Converters/GroupedTableConverter.cs

@@ -78,7 +78,7 @@ namespace ICSharpCode.Reports.Core.Exporter
 					base.CurrentPosition = ConvertContainer(exporterCollection,headerRow,base.DefaultLeftPosition,base.CurrentPosition);
 				}
 
-				BaseGroupedRow row = table.Items[1] as BaseGroupedRow;
+				GroupHeader row = table.Items[1] as GroupHeader;
 				
 				if (row != null) {
 					
@@ -187,7 +187,7 @@ namespace ICSharpCode.Reports.Core.Exporter
 			var rowSize = Size.Empty;
 			ReportItemCollection groupCollection = null;
 			
-			var groupedRow  = new Collection<BaseGroupedRow>(table.Items.OfType<BaseGroupedRow>().ToList());
+			var groupedRow  = new Collection<GroupHeader>(table.Items.OfType<GroupHeader>().ToList());
 			
 			if (groupedRow.Count == 0) {