diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
index 0d19b03..e8c07b7 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -76,8 +76,11 @@
                     var ws = (XLWorksheet)Worksheets.Add(sheetName);
 
                     var sheetFormatProperties = (SheetFormatProperties)worksheetPart.Worksheet.Descendants<SheetFormatProperties>().First();
-                    ws.RowHeight = sheetFormatProperties.DefaultRowHeight;
-                    ws.ColumnWidth = sheetFormatProperties.DefaultColumnWidth;
+                    if (sheetFormatProperties.DefaultRowHeight != null)
+                        ws.RowHeight = sheetFormatProperties.DefaultRowHeight;
+
+                    if (sheetFormatProperties.DefaultColumnWidth != null)
+                        ws.ColumnWidth = sheetFormatProperties.DefaultColumnWidth;
 
                     foreach (var mCell in worksheetPart.Worksheet.Descendants<MergeCell>())
                     {
@@ -85,13 +88,14 @@
                         ws.Range(mergeCell.Reference).Merge();
                     }
 
+                    Column wsDefaultColumn = null;
+                    var defaultColumns = worksheetPart.Worksheet.Descendants<Column>().Where(c => c.Max == XLWorksheet.MaxNumberOfColumns);
+                    if (defaultColumns.Count() > 0)
+                        wsDefaultColumn = defaultColumns.Single();
 
-                    var wsDefaultColumn = worksheetPart.Worksheet.Descendants<Column>().Where(
-                        c => c.Max == XLWorksheet.MaxNumberOfColumns).Single();
+                    if (wsDefaultColumn != null && wsDefaultColumn.Width != null) ws.ColumnWidth = wsDefaultColumn.Width;
 
-                    if (wsDefaultColumn.Width != null) ws.ColumnWidth = wsDefaultColumn.Width;
-
-                    Int32 styleIndexDefault = wsDefaultColumn.Style != null ? Int32.Parse(wsDefaultColumn.Style.InnerText) : -1;
+                    Int32 styleIndexDefault = wsDefaultColumn != null && wsDefaultColumn.Style != null ? Int32.Parse(wsDefaultColumn.Style.InnerText) : -1;
                     if (styleIndexDefault >= 0)
                     {
                         ApplyStyle(ws, styleIndexDefault, s, fills, borders, fonts, numberingFormats);
@@ -214,39 +218,51 @@
                         }
                     }
 
-                    var printOptions = (PrintOptions)worksheetPart.Worksheet.Descendants<PrintOptions>().First();
-                    ws.PageSetup.ShowGridlines = printOptions.GridLines;
-                    ws.PageSetup.CenterHorizontally = printOptions.HorizontalCentered;
-                    ws.PageSetup.CenterVertically = printOptions.VerticalCentered;
-                    ws.PageSetup.ShowRowAndColumnHeadings = printOptions.Headings;
-
-                    var pageMargins = (PageMargins)worksheetPart.Worksheet.Descendants<PageMargins>().First();
-                    ws.PageSetup.Margins.Bottom = pageMargins.Bottom;
-                    ws.PageSetup.Margins.Footer = pageMargins.Footer;
-                    ws.PageSetup.Margins.Header = pageMargins.Header;
-                    ws.PageSetup.Margins.Left = pageMargins.Left;
-                    ws.PageSetup.Margins.Right = pageMargins.Right;
-                    ws.PageSetup.Margins.Top = pageMargins.Top;
-
-                    var pageSetup = (PageSetup)worksheetPart.Worksheet.Descendants<PageSetup>().First();
-                    ws.PageSetup.PaperSize = (XLPaperSize)Int32.Parse(pageSetup.PaperSize.InnerText);
-                    if (pageSetup.Scale != null)
+                    var printOptionsQuery = worksheetPart.Worksheet.Descendants<PrintOptions>();
+                    if (printOptionsQuery.Count() > 1)
                     {
-                        ws.PageSetup.Scale = Int32.Parse(pageSetup.Scale.InnerText);
+                        var printOptions = (PrintOptions)printOptionsQuery.First();
+                        ws.PageSetup.ShowGridlines = printOptions.GridLines;
+                        ws.PageSetup.CenterHorizontally = printOptions.HorizontalCentered;
+                        ws.PageSetup.CenterVertically = printOptions.VerticalCentered;
+                        ws.PageSetup.ShowRowAndColumnHeadings = printOptions.Headings;
                     }
-                    else
+
+                    var pageMarginsQuery = worksheetPart.Worksheet.Descendants<PageMargins>();
+                    if (pageMarginsQuery.Count() > 0)
                     {
-                        ws.PageSetup.FitToPages(Int32.Parse(pageSetup.FitToWidth.InnerText), Int32.Parse(pageSetup.FitToHeight.InnerText));
+                        var pageMargins = (PageMargins)pageMarginsQuery.First();
+                        ws.PageSetup.Margins.Bottom = pageMargins.Bottom;
+                        ws.PageSetup.Margins.Footer = pageMargins.Footer;
+                        ws.PageSetup.Margins.Header = pageMargins.Header;
+                        ws.PageSetup.Margins.Left = pageMargins.Left;
+                        ws.PageSetup.Margins.Right = pageMargins.Right;
+                        ws.PageSetup.Margins.Top = pageMargins.Top;
                     }
-                    ws.PageSetup.PageOrder = pageOrderValues.Single(p => p.Value == pageSetup.PageOrder).Key;
-                    ws.PageSetup.PageOrientation = pageOrientationValues.Single(p => p.Value == pageSetup.Orientation).Key;
-                    ws.PageSetup.BlackAndWhite = pageSetup.BlackAndWhite;
-                    ws.PageSetup.DraftQuality = pageSetup.Draft;
-                    ws.PageSetup.ShowComments = showCommentsValues.Single(sc => sc.Value == pageSetup.CellComments).Key;
-                    ws.PageSetup.PrintErrorValue = printErrorValues.Single(p => p.Value == pageSetup.Errors).Key;
-                    if (pageSetup.HorizontalDpi != null) ws.PageSetup.HorizontalDpi = Int32.Parse(pageSetup.HorizontalDpi.InnerText);
-                    if (pageSetup.VerticalDpi != null) ws.PageSetup.VerticalDpi = Int32.Parse(pageSetup.VerticalDpi.InnerText);
-                    if (pageSetup.FirstPageNumber != null) ws.PageSetup.FirstPageNumber = Int32.Parse(pageSetup.FirstPageNumber.InnerText);
+
+                    var pageSetupQuery = worksheetPart.Worksheet.Descendants<PageSetup>();
+                    if (pageSetupQuery.Count() > 0)
+                    {
+                        var pageSetup = (PageSetup)pageSetupQuery.First();
+                        ws.PageSetup.PaperSize = (XLPaperSize)Int32.Parse(pageSetup.PaperSize.InnerText);
+                        if (pageSetup.Scale != null)
+                        {
+                            ws.PageSetup.Scale = Int32.Parse(pageSetup.Scale.InnerText);
+                        }
+                        else
+                        {
+                            ws.PageSetup.FitToPages(Int32.Parse(pageSetup.FitToWidth.InnerText), Int32.Parse(pageSetup.FitToHeight.InnerText));
+                        }
+                        ws.PageSetup.PageOrder = pageOrderValues.Single(p => p.Value == pageSetup.PageOrder).Key;
+                        ws.PageSetup.PageOrientation = pageOrientationValues.Single(p => p.Value == pageSetup.Orientation).Key;
+                        ws.PageSetup.BlackAndWhite = pageSetup.BlackAndWhite;
+                        ws.PageSetup.DraftQuality = pageSetup.Draft;
+                        ws.PageSetup.ShowComments = showCommentsValues.Single(sc => sc.Value == pageSetup.CellComments).Key;
+                        ws.PageSetup.PrintErrorValue = printErrorValues.Single(p => p.Value == pageSetup.Errors).Key;
+                        if (pageSetup.HorizontalDpi != null) ws.PageSetup.HorizontalDpi = Int32.Parse(pageSetup.HorizontalDpi.InnerText);
+                        if (pageSetup.VerticalDpi != null) ws.PageSetup.VerticalDpi = Int32.Parse(pageSetup.VerticalDpi.InnerText);
+                        if (pageSetup.FirstPageNumber != null) ws.PageSetup.FirstPageNumber = Int32.Parse(pageSetup.FirstPageNumber.InnerText);
+                    }
 
                     var headerFooters = worksheetPart.Worksheet.Descendants<HeaderFooter>();
                     if (headerFooters.Count() > 0)
@@ -271,6 +287,7 @@
                         var firstHeader = (FirstHeader)headerFooter.FirstHeader;
                         xlHeader.SetInnerText(XLHFOccurrence.FirstPage, firstHeader.Text);
                     }
+
                     var sheetProperties = worksheetPart.Worksheet.Descendants<SheetProperties>();
                     if (sheetProperties.Count() > 0)
                     {
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/Misc/Collections.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/Misc/Collections.cs
index fc271e7..4296d5f 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/Misc/Collections.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/Misc/Collections.cs
@@ -89,7 +89,8 @@
             ws.Cell(6, 6).Value = "Query";
             ws.Cell(6, 6).Style.Fill.BackgroundColor = Color.Cyan;
             ws.Range(6, 6, 6, 8).Merge();
-            ws.Cell(7, 6).Value = people.AsEnumerable();
+            ws.Cell(7, 6).Value = people.AsEnumerable();    // Very Important to call the AsEnumerable method
+                                                            // otherwise it won't be copied.
 
 
             ws.Columns().AdjustToContents();
diff --git a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
index e98d334..4b62699 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
@@ -12,16 +12,11 @@
     {
         static void Main(string[] args)
         {
-            var wb = new XLWorkbook();
-            var ws = wb.Worksheets.Add("Test");
+            var wb = new XLWorkbook(@"C:\Excel Files\ForTesting\Blank.xlsx");
+            var ws = wb.Worksheets.Worksheet("Sheet1");
 
-            var lst = new List<Person>();
-            lst.Add(new Person(){ Name = "Manuel", Age = 33});
-            lst.Add(new Person() { Name = "Carlos", Age = 32 });
-
-            ws.Cell(1, 1).Value = lst;
-                        
-            //wb.Load(@"c:\Initial.xlsx");
+            ws.Cell(1, 1).Value = "something";
+            
             wb.SaveAs(@"C:\Excel Files\ForTesting\Sandbox.xlsx");
             //Console.ReadKey();
         }
@@ -33,7 +28,5 @@
         }
 
         // Save defaults to a .config file
-
-        // Add/Copy/Paste (maybe another name?) rows, columns, ranges into an area.
     }
 }