System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=MigraDoc.DocumentObjectModel
  StackTrace:
   at MigraDoc.DocumentObjectModel.Visitors.VisitorBase.VisitParagraph(Paragraph paragraph)
   at MigraDoc.DocumentObjectModel.Paragraph.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.DocumentElements.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Tables.Cell.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Tables.Row.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Tables.Rows.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Tables.Table.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.DocumentElements.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Section.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Sections.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Document.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
   at MigraDoc.DocumentObjectModel.Visitors.VisitorBase.Visit(DocumentObject documentObject)
   at MigraDoc.Rendering.DocumentRenderer.PrepareDocument()
   at MigraDoc.Rendering.PdfDocumentRenderer.PrepareDocumentRenderer(Boolean prepareCompletely)
   at MigraDoc.Rendering.PdfDocumentRenderer.PrepareRenderPages()
   at MigraDoc.Rendering.PdfDocumentRenderer.RenderDocument()

        public static void TabelWithBorderTest()
        {
           var document = new Document();

           // Add a section to the document.
           var section = document.AddSection();

           Table table = section.AddTable();
           table.Borders.Width = 0.25;
           table.Rows.LeftIndent = 0;

           // Before you can add a row, you must define the columns
           Column column = table.AddColumn("7cm");
           column.Format.Alignment = ParagraphAlignment.Left;
            //
            table.AddColumn("8cm");
            //

           Row row = table.AddRow();
           row.Cells[0].AddParagraph("Text 1");
            //
            row.Cells[1].AddParagraph("Text 2");
            table.Columns.RemoveObjectAt(0);
            //

            // Create a renderer for the MigraDoc document.
            var pdfRenderer = new PdfDocumentRenderer(false) { Document = document };

           // Associate the MigraDoc document with a renderer.

           // Layout and render document to PDF.
           pdfRenderer.RenderDocument();

           // Save the document...
           const string filename = "Table.pdf";
           pdfRenderer.PdfDocument.Save(filename);
           // ...and start a viewer.
           Process.Start(filename);
        }

Table table = section.AddTable();

table.AddColumn("7cm");
table.AddColumn("7cm");

Row row = table.AddRow();
table.Rows[0].Cells[0].AddParagraph("Text 1");

table.Columns.RemoveObjectAt(1);