diff --git a/Controls.DocumentViewer/DocumentViewer.vb b/Controls.DocumentViewer/DocumentViewer.vb
index 22bac6cf..c540e4b2 100644
--- a/Controls.DocumentViewer/DocumentViewer.vb
+++ b/Controls.DocumentViewer/DocumentViewer.vb
@@ -199,7 +199,7 @@ Public Class DocumentViewer
                     RichEditControl1.Visible = True
                     RichEditControl1.Dock = DockStyle.Fill
 
-                Case ".XLSX", ".XLS", "CSV"
+                Case ".XLSX", ".XLS", ".CSV"
                     SpreadsheetControl1.LoadDocument(FilePath, GetSpreadsheetFormat(oExtension))
 
                     Dim oRange = SpreadsheetControl1.ActiveWorksheet.GetUsedRange()
@@ -254,7 +254,7 @@ Public Class DocumentViewer
                     RichEditControl1.Visible = True
                     RichEditControl1.Dock = DockStyle.Fill
 
-                Case ".XLSX", ".XLS", "CSV"
+                Case ".XLSX", ".XLS", ".CSV"
                     SpreadsheetControl1.LoadDocument(Stream, GetSpreadsheetFormat(Extension))
 
                     Dim oRange = SpreadsheetControl1.ActiveWorksheet.GetUsedRange()
@@ -285,9 +285,9 @@ Public Class DocumentViewer
         Dim oFormat As Spreadsheet.DocumentFormat = Spreadsheet.DocumentFormat.Undefined
 
         Select Case Extension.ToUpper
-            Case "XLSX" : oFormat = Spreadsheet.DocumentFormat.Xlsx
-            Case "XLS" : oFormat = Spreadsheet.DocumentFormat.Xls
-            Case "CSV" : oFormat = Spreadsheet.DocumentFormat.Csv
+            Case ".XLSX" : oFormat = Spreadsheet.DocumentFormat.Xlsx
+            Case ".XLS" : oFormat = Spreadsheet.DocumentFormat.Xls
+            Case ".CSV" : oFormat = Spreadsheet.DocumentFormat.Csv
         End Select
 
         Return oFormat
diff --git a/Controls.DocumentViewer/My Project/AssemblyInfo.vb b/Controls.DocumentViewer/My Project/AssemblyInfo.vb
index 3110a8e1..5ec8e584 100644
--- a/Controls.DocumentViewer/My Project/AssemblyInfo.vb	
+++ b/Controls.DocumentViewer/My Project/AssemblyInfo.vb	
@@ -31,5 +31,5 @@ Imports System.Runtime.InteropServices
 ' übernehmen, indem Sie "*" eingeben:
 ' <Assembly: AssemblyVersion("1.0.*")>
 
-<Assembly: AssemblyVersion("1.6.4.0")>
-<Assembly: AssemblyFileVersion("1.6.4.0")>
+<Assembly: AssemblyVersion("1.6.5.0")>
+<Assembly: AssemblyFileVersion("1.6.5.0")>