After upgrading to DevExpress 24or 25, you may encounter the following error when using the RichEditDocumentServer class.

error BC30451: 'TableBorderLineStyle' is not declared. It may be inaccessible due to its protection level.

This is an error you will get if you have code like this:

 With tStyleMain
     .FontSize = 10
     .CellLeftPadding = CellPadding
     .CellRightPadding = CellPadding
     .CellTopPadding = CellPadding
     .CellBottomPadding = CellPadding
     With .TableBorders
         .InsideHorizontalBorder.LineStyle = TableBorderLineStyle.Single
         .InsideVerticalBorder.LineStyle = TableBorderLineStyle.Single
         .Top.LineStyle = TableBorderLineStyle.Single
         .Left.LineStyle = TableBorderLineStyle.Single
         .Bottom.LineStyle = TableBorderLineStyle.Single
         .Right.LineStyle = TableBorderLineStyle.Single
     End With
     .TableLayout = TableLayoutType.Autofit
     .Name = "Table Details"
 End With

The example here is in VisualBasic.NET.

The issue here is that there has been a breaking change where this enum, TableBorderLineStyle has been renamed to BorderLineStyle.

As they explain:

The BorderLineStyle enumeration is used for table, page, and paragraph borders.

The updated code will look like this:

  With tStyleMain
      .FontSize = 10
      .CellLeftPadding = CellPadding
      .CellRightPadding = CellPadding
      .CellTopPadding = CellPadding
      .CellBottomPadding = CellPadding
      With .TableBorders
          .InsideHorizontalBorder.LineStyle = BorderLineStyle.Single
          .InsideVerticalBorder.LineStyle = BorderLineStyle.Single
          .Top.LineStyle = BorderLineStyle.Single
          .Left.LineStyle = BorderLineStyle.Single
          .Bottom.LineStyle = BorderLineStyle.Single
          .Right.LineStyle = BorderLineStyle.Single
      End With
      .TableLayout = TableLayoutType.Autofit
      .Name = "Table Details"
  End With

TLDR

The TableBorderLineStyle enum has been renemed to BorderLineStyle from DevExpress 24 onwards