diff --git a/CompuMaster.TaskManagement.UI.WinForms/CompuMaster.TaskManagement.UI.WinForms.vbproj b/CompuMaster.TaskManagement.UI.WinForms/CompuMaster.TaskManagement.UI.WinForms.vbproj
index 6c506f4..265a489 100644
--- a/CompuMaster.TaskManagement.UI.WinForms/CompuMaster.TaskManagement.UI.WinForms.vbproj
+++ b/CompuMaster.TaskManagement.UI.WinForms/CompuMaster.TaskManagement.UI.WinForms.vbproj
@@ -46,13 +46,6 @@
     <Import Include="System.Windows.Forms" />
   </ItemGroup>
 
-  <ItemGroup>
-    <None Include="..\README.md">
-      <Pack>True</Pack>
-      <PackagePath>\</PackagePath>
-    </None>
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\CompuMaster.TaskManagement\CompuMaster.TaskManagement.vbproj" />
   </ItemGroup>
diff --git a/CompuMaster.TaskManagement.UI.WinForms/MultiTaskProgessForm.vb b/CompuMaster.TaskManagement.UI.WinForms/MultiTaskProgessForm.vb
index 6b1c792..d3b9a71 100644
--- a/CompuMaster.TaskManagement.UI.WinForms/MultiTaskProgessForm.vb
+++ b/CompuMaster.TaskManagement.UI.WinForms/MultiTaskProgessForm.vb
@@ -67,11 +67,11 @@ Public Class MultiTaskProgessForm
         With Nothing
             Dim ETA = Me.TaskBundle.EstimatedTimeOfArrival
             If ETA.HasValue Then
-                NewFormTitle &= " - ETA: " & ETA.Value.ToString("d\.hh\:mm\:ss")
+                NewFormTitle &= " - ETA: " & ETA.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture)
             Else
                 Dim ETR = Me.TaskBundle.EstimatedTimeToRun
                 If ETR.HasValue Then
-                    NewFormTitle &= " - ETA: " & ETR.Value.ToString("d\.hh\:mm\:ss")
+                    NewFormTitle &= " - ETA: " & ETR.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture)
                 End If
             End If
         End With
@@ -146,7 +146,7 @@ Public Class MultiTaskProgessForm
     Private Sub UpdateProgressBar(control As ProgressingTaskControl, taskItem As ProgressingTaskItem)
         Dim ProgressMaximum As Integer = taskItem.TotalStepsCount * 100
         Dim StepProgressValue As Integer = If(taskItem.RunningStep?.EstimatedTimeToRun.HasValue AndAlso taskItem.RunningStep?.ConsumedTime.HasValue, System.Math.Min(100, CInt(taskItem.RunningStep.ConsumedTime.Value.TotalSeconds / taskItem.RunningStep.EstimatedTimeToRun.Value.TotalSeconds * 100)), 0)
-        Dim StepProgressValueText As String = If(taskItem.RunningStep?.EstimatedTimeToRun.HasValue, " (ca. " & StepProgressValue.ToString() & " %)", "")
+        Dim StepProgressValueText As String = If(taskItem.RunningStep?.EstimatedTimeToRun.HasValue, " (ca. " & StepProgressValue.ToString(System.Globalization.CultureInfo.InvariantCulture) & " %)", "")
         Dim NewProgressValue As Integer = System.Math.Min(ProgressMaximum, taskItem.RunningTotalStepNumber.GetValueOrDefault * 100 + StepProgressValue)
         control.Visible = True
         control.GroupBox.Text = taskItem.TaskTitle
@@ -156,21 +156,21 @@ Public Class MultiTaskProgessForm
             Case ProgressingTaskItem.ProgressingTaskStatus.NotStarted
                 control.LabelStepInfo.Text = "Noch nicht gestartet, insgesamt " & taskItem.TotalStepsCount & " Schritte"
                 If taskItem.EstimatedTimeOfArrival.HasValue Then
-                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss") & ""
+                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & ""
                 End If
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressInformation)
             Case ProgressingTaskItem.ProgressingTaskStatus.InProgress
                 control.LabelStepInfo.Text = "In Bearbeitung: Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle & StepProgressValueText
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressInformation)
                 If taskItem.EstimatedTimeOfArrival.HasValue Then
-                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss") & ""
+                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & ""
                 End If
             Case ProgressingTaskItem.ProgressingTaskStatus.FailingInCriticalState
                 control.LabelStepInfo.Text = "Fehlschlag erkannt, aktuell in Bearbeitung: Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle & StepProgressValueText
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressErrors)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Red
                 If taskItem.EstimatedTimeOfArrival.HasValue Then
-                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss") & ""
+                    control.LabelStepInfo.Text &= System.Environment.NewLine & "ETA: " & taskItem.EstimatedTimeOfArrival.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & ""
                 End If
             Case ProgressingTaskItem.ProgressingTaskStatus.FailingWithRollbackOption
                 control.LabelStepInfo.Text = "Fehlschlag erkannt, aktuell in Bearbeitung: Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle & StepProgressValueText
@@ -181,17 +181,17 @@ Public Class MultiTaskProgessForm
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressErrors)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Yellow
             Case ProgressingTaskItem.ProgressingTaskStatus.Completed
-                control.LabelStepInfo.Text = "Erfolgreich abgeschlossen in " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss") & " (d.hh:min:sec)"
+                control.LabelStepInfo.Text = "Erfolgreich abgeschlossen in " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & " (d.hh:min:sec)"
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressInformation)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Green
             Case ProgressingTaskItem.ProgressingTaskStatus.FailedWithRollbackOption
-                control.LabelStepInfo.Text = "Fehlgeschlagen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss") & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
+                control.LabelStepInfo.Text = "Fehlgeschlagen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressErrors)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Yellow
                 control.ProgressBar.Value = control.ProgressBar.Maximum 'stops the animation effect
                 control.ProgressBar.Value = NewProgressValue
             Case ProgressingTaskItem.ProgressingTaskStatus.FailedInCriticalState
-                control.LabelStepInfo.Text = "Fehlgeschlagen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss") & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
+                control.LabelStepInfo.Text = "Fehlgeschlagen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressErrors)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Red
                 control.ProgressBar.Value = control.ProgressBar.Maximum 'stops the animation effect
@@ -200,7 +200,7 @@ Public Class MultiTaskProgessForm
                 control.LabelStepInfo.Text = "Übersprungen"
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressInformation)
             Case ProgressingTaskItem.ProgressingTaskStatus.Aborted
-                control.LabelStepInfo.Text = "Abgebrochen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss") & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
+                control.LabelStepInfo.Text = "Abgebrochen nach " & taskItem.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture) & " (d.hh:min:sec): Schritt " & taskItem.RunningTotalStepNumber.Value & "/" & taskItem.TotalStepsCount & ": " & taskItem.RunningStep.StepTitle
                 SetToolTipForTaskControl(control, taskItem.SummaryText, TaskResultToolTipType.ProgressErrors)
                 CType(control, ProgressingTaskControl).GroupBox.BackColor = Color.Yellow
                 control.ProgressBar.Value = control.ProgressBar.Maximum 'stops the animation effect
diff --git a/CompuMaster.TaskManagement/Exceptions/StepException.vb b/CompuMaster.TaskManagement/Exceptions/StepException.vb
new file mode 100644
index 0000000..04dc068
--- /dev/null
+++ b/CompuMaster.TaskManagement/Exceptions/StepException.vb
@@ -0,0 +1,21 @@
+Namespace Exceptions
+
+#Disable Warning CA2237 ' Mark ISerializable types with serializable
+#Disable Warning CA1032 ' Implement standard exception constructors
+    Public Class StepException
+
+#Enable Warning CA1032 ' Implement standard exception constructors
+#Enable Warning CA2237 ' Mark ISerializable types with serializable
+        Inherits System.Exception
+
+        Public Sub New(message As String)
+            MyBase.New(message)
+        End Sub
+
+        Public Sub New(message As String, innerException As Exception)
+            MyBase.New(message, innerException)
+        End Sub
+
+    End Class
+
+End Namespace
\ No newline at end of file
diff --git a/CompuMaster.TaskManagement/UserAbortedMessageException.vb b/CompuMaster.TaskManagement/Exceptions/UserAbortedMessageException.vb
similarity index 100%
rename from CompuMaster.TaskManagement/UserAbortedMessageException.vb
rename to CompuMaster.TaskManagement/Exceptions/UserAbortedMessageException.vb
diff --git a/CompuMaster.TaskManagement/ProgressingTaskBundle.vb b/CompuMaster.TaskManagement/ProgressingTaskBundle.vb
index 7981da0..8598d39 100644
--- a/CompuMaster.TaskManagement/ProgressingTaskBundle.vb
+++ b/CompuMaster.TaskManagement/ProgressingTaskBundle.vb
@@ -96,7 +96,7 @@ Public Class ProgressingTaskBundle
     Private Async Function RunAllTasksAsync(cancellationToken As Threading.CancellationToken) As Task
         ' Überprüfung auf doppelte Instanzen (Objektidentität)
         Dim duplicates = Tasks.GroupBy(Function(t) t).Where(Function(g) g.Count() > 1).Select(Function(g) g.Key).ToList()
-        If duplicates.Any() Then
+        If duplicates.Count <> 0 Then
             Throw New InvalidOperationException("Doppelte Instanzen von ProgressingTaskItem in der Aufgabenliste gefunden.")
         End If
 
diff --git a/CompuMaster.TaskManagement/ProgressingTaskItem.vb b/CompuMaster.TaskManagement/ProgressingTaskItem.vb
index 69cf4eb..a050494 100644
--- a/CompuMaster.TaskManagement/ProgressingTaskItem.vb
+++ b/CompuMaster.TaskManagement/ProgressingTaskItem.vb
@@ -3,6 +3,7 @@ Option Strict On
 
 Imports System.Threading
 Imports CompuMaster.TaskManagement.ProgressingTaskStepBase
+Imports CompuMaster.TaskManagement.Exceptions
 
 Public Class ProgressingTaskItem
 
@@ -44,11 +45,11 @@ Public Class ProgressingTaskItem
         ''' <summary>
         ''' Must always run (for e.g. rollback tasks), even if previous tasks failed or were cancelled
         ''' </summary>
-        RunAlways
+        RunAlways = 0
         ''' <summary>
         ''' Run only if previous tasks completed successfully and no cancellation was requested, otherweise skip
         ''' </summary>
-        SkipIfPreviousTasksFailedOrCancelled
+        SkipIfPreviousTasksFailedOrCancelled = 1
     End Enum
 
     ''' <summary>
@@ -178,7 +179,7 @@ Public Class ProgressingTaskItem
     ''' <returns></returns>
     Public Function TotalStepItem(totalStepIndex As Integer) As ProgressingTaskStepBase
         If totalStepIndex < 0 OrElse totalStepIndex >= TotalStepsCount Then
-            Throw New ArgumentOutOfRangeException(NameOf(totalStepIndex), "Argument totalStepIndex=" & totalStepIndex.ToString & ", but allowed range=0.." & TotalStepsCount - 1)
+            Throw New ArgumentOutOfRangeException(NameOf(totalStepIndex), "Argument totalStepIndex=" & totalStepIndex.ToString(System.Globalization.CultureInfo.InvariantCulture) & ", but allowed range=0.." & TotalStepsCount - 1)
         End If
         If totalStepIndex < FirstStepsWhichCanBeRolledBack.Count Then
             Return FirstStepsWhichCanBeRolledBack(totalStepIndex)
@@ -247,7 +248,7 @@ Public Class ProgressingTaskItem
                         Next
                     Catch ex As Exceptions.UserAbortedMessageException
                         'Log exception
-                        LoggedExceptions.Add(New Exception("Step " & _RunningStepNumber.Value & " aborted: " & CurrentStep.StepTitle, ex))
+                        LoggedExceptions.Add(New StepException("Step " & _RunningStepNumber.Value & " aborted: " & CurrentStep.StepTitle, ex))
                         Status = ProgressingTaskItem.ProgressingTaskStatus.Aborting
                         _EndTime = DateTime.Now
 
@@ -255,7 +256,7 @@ Public Class ProgressingTaskItem
                         CreateRollbackTaskItemAndAppendToTaskBundle()
                     Catch ex As Exception
                         'Log exception
-                        LoggedExceptions.Add(New Exception("Step " & _RunningStepNumber.Value & " failed: " & CurrentStep.StepTitle, ex))
+                        LoggedExceptions.Add(New StepException("Step " & _RunningStepNumber.Value & " failed: " & CurrentStep.StepTitle, ex))
                         Status = ProgressingTaskItem.ProgressingTaskStatus.FailingWithRollbackOption
                         _EndTime = DateTime.Now
 
@@ -429,9 +430,9 @@ Public Class ProgressingTaskItem
     Public Function ConsumedTimeStatisticsInfo(Optional fullLength As Boolean = False) As String
         Dim Result As New Text.StringBuilder
         Result.AppendLine("Consumed time statistics for task:")
-        If Me.EstimatedTimeToRun.HasValue Then Result.AppendLine("* Estimated time: " & Me.EstimatedTimeToRun.Value.ToString("d\.hh\:mm\:ss"))
+        If Me.EstimatedTimeToRun.HasValue Then Result.AppendLine("* Estimated time: " & Me.EstimatedTimeToRun.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture))
         'Show consumed time statistics for each step if full length is requested or if there are less than 40 steps
-        If Me.ConsumedTime.HasValue Then Result.AppendLine("* Consumed time: " & Me.ConsumedTime.Value.ToString("d\.hh\:mm\:ss"))
+        If Me.ConsumedTime.HasValue Then Result.AppendLine("* Consumed time: " & Me.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture))
         If Not Me.EstimatedTimeToRun.HasValue AndAlso Not Me.ConsumedTime.HasValue Then Result.AppendLine("* No time information available")
 
         Dim StartIndex As Integer
@@ -449,8 +450,8 @@ Public Class ProgressingTaskItem
             Dim CurrentStep As ProgressingTaskStepBase = Me.TotalStepItem(MyCounter)
             Result.AppendLine()
             Result.AppendLine("Step " & MyCounter + 1 & ": " & CurrentStep.StepTitle)
-            If CurrentStep.EstimatedTimeToRun.HasValue Then Result.AppendLine("* Estimated time: " & CurrentStep.EstimatedTimeToRun.Value.ToString("d\.hh\:mm\:ss"))
-            If CurrentStep.ConsumedTime.HasValue Then Result.AppendLine("* Consumed time: " & CurrentStep.ConsumedTime.Value.ToString("d\.hh\:mm\:ss"))
+            If CurrentStep.EstimatedTimeToRun.HasValue Then Result.AppendLine("* Estimated time: " & CurrentStep.EstimatedTimeToRun.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture))
+            If CurrentStep.ConsumedTime.HasValue Then Result.AppendLine("* Consumed time: " & CurrentStep.ConsumedTime.Value.ToString("d\.hh\:mm\:ss", System.Globalization.CultureInfo.InvariantCulture))
             If Not CurrentStep.EstimatedTimeToRun.HasValue AndAlso Not CurrentStep.ConsumedTime.HasValue Then Result.AppendLine("* No time information available")
         Next
         Return Result.ToString
@@ -517,7 +518,7 @@ Public Class ProgressingTaskItem
     ''' Erstellen eines StackTrace ohne die letzte Methode
     ''' </summary>
     ''' <returns></returns>
-    Private Function GetStackTraceWithoutLastMethod() As String
+    Private Shared Function GetStackTraceWithoutLastMethod() As String
         ' Holen Sie sich den vollständigen StackTrace
         Dim fullStackTrace As String = Environment.StackTrace
 
diff --git a/CompuMaster.TaskManagement/ProgressingTaskStepBase.vb b/CompuMaster.TaskManagement/ProgressingTaskStepBase.vb
index 5f7086b..1d4da4c 100644
--- a/CompuMaster.TaskManagement/ProgressingTaskStepBase.vb
+++ b/CompuMaster.TaskManagement/ProgressingTaskStepBase.vb
@@ -1,4 +1,5 @@
 Imports CompuMaster.TaskManagement.ProgressingTaskBundle
+Imports CompuMaster.TaskManagement.Exceptions
 
 Public MustInherit Class ProgressingTaskStepBase
 
@@ -51,7 +52,7 @@ Public MustInherit Class ProgressingTaskStepBase
                     Me.Status = ProgressingTaskStepStatus.Failed
                     _EndTime = DateTime.Now
                     Me.FoundException = ex
-                    Throw New Exception("Fehlgeschlagener Einzelschritt: " & StepTitle, ex)
+                    Throw New StepException("Fehlgeschlagener Einzelschritt: " & StepTitle, ex)
                 End Try
             Case ProgressingTaskStepStatus.InProgress
                 Throw New InvalidOperationException("This step is already in progress")
@@ -89,7 +90,7 @@ Public MustInherit Class ProgressingTaskStepBase
         Failed = 3
     End Enum
 
-    Public Status As ProgressingTaskStepStatus = ProgressingTaskStepStatus.NotStarted
+    Public Property Status As ProgressingTaskStepStatus = ProgressingTaskStepStatus.NotStarted
 
     Public Enum ProgressingTaskStepFailAction
         ''' <summary>
@@ -126,7 +127,7 @@ Public MustInherit Class ProgressingTaskStepBase
         CollectedWarnings.Add(New ValueTuple(Of String, String)(warning, stacktrace))
     End Sub
 
-    Private Function GetStackTraceWithoutLastMethod() As String
+    Private Shared Function GetStackTraceWithoutLastMethod() As String
         ' Holen Sie sich den vollständigen StackTrace
         Dim fullStackTrace As String = Environment.StackTrace
 
diff --git a/CompuMaster.TaskManagement/Tools.vb b/CompuMaster.TaskManagement/Tools.vb
index 00b763f..35c0af9 100644
--- a/CompuMaster.TaskManagement/Tools.vb
+++ b/CompuMaster.TaskManagement/Tools.vb
@@ -45,7 +45,7 @@ Friend NotInheritable Class Tools
         ElseIf spaceCountForIndentation > 0 Then 'Add indentation
             Return CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation) & text.Replace(ControlChars.CrLf, ControlChars.CrLf & CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation))
         Else 'Remove indentation
-            If text.StartsWith(CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation)) Then
+            If text.StartsWith(CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation), False, System.Globalization.CultureInfo.InvariantCulture) Then
                 'remove indentation at begin of text
                 Return text.Substring(spaceCountForIndentation).Replace(ControlChars.CrLf & CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation), ControlChars.CrLf)
             Else
@@ -68,7 +68,7 @@ Friend NotInheritable Class Tools
         ElseIf spaceCountForIndentation > 0 Then 'Add indentation
             Return CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation) & text.Replace(lineBreak, lineBreak & CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation))
         Else 'Remove indentation
-            If text.StartsWith(CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation)) Then
+            If text.StartsWith(CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation), False, System.Globalization.CultureInfo.InvariantCulture) Then
                 'remove indentation at begin of text
                 Return text.Substring(spaceCountForIndentation).Replace(lineBreak & CompuMaster.VisualBasicCompatibility.Strings.Space(spaceCountForIndentation), lineBreak)
             Else
@@ -117,9 +117,9 @@ Friend NotInheritable Class Tools
     Public Shared Function PathCombine(absolutePath As String, relativePath As String) As String
         absolutePath = ConvertPathWithDirectorySeparatorsForCurrentPlatform(absolutePath)
         relativePath = ConvertPathWithDirectorySeparatorsForCurrentPlatform(relativePath)
-        If relativePath.StartsWith("." & System.IO.Path.DirectorySeparatorChar) Then
+        If relativePath.StartsWith("." & System.IO.Path.DirectorySeparatorChar, False, System.Globalization.CultureInfo.InvariantCulture) Then
             Return PathCombine(absolutePath, relativePath.Substring(2))
-        ElseIf relativePath.StartsWith(".." & System.IO.Path.DirectorySeparatorChar) Then
+        ElseIf relativePath.StartsWith(".." & System.IO.Path.DirectorySeparatorChar, False, System.Globalization.CultureInfo.InvariantCulture) Then
             Return PathCombine(System.IO.Path.GetDirectoryName(absolutePath), relativePath.Substring(3))
         Else
             Return System.IO.Path.Combine(absolutePath, relativePath)
@@ -172,13 +172,13 @@ Friend NotInheritable Class Tools
             Return Nothing
         ElseIf basePathForRelativePath = Nothing Then
             Return absolutePath
-        ElseIf basePathForRelativePath.EndsWith(System.IO.Path.DirectorySeparatorChar) AndAlso absolutePath.StartsWith(basePathForRelativePath) Then
+        ElseIf basePathForRelativePath.EndsWith(System.IO.Path.DirectorySeparatorChar, False, System.Globalization.CultureInfo.InvariantCulture) AndAlso absolutePath.StartsWith(basePathForRelativePath, False, System.Globalization.CultureInfo.InvariantCulture) Then
             Dim ParentPathChain As String = ""
             For MyCounter As Integer = 1 To parentLevel
                 ParentPathChain &= ".." & System.IO.Path.DirectorySeparatorChar
             Next
             Return ParentPathChain & absolutePath.Replace(basePathForRelativePath, "")
-        ElseIf absolutePath.StartsWith(basePathForRelativePath & System.IO.Path.DirectorySeparatorChar) Then
+        ElseIf absolutePath.StartsWith(basePathForRelativePath & System.IO.Path.DirectorySeparatorChar, False, System.Globalization.CultureInfo.InvariantCulture) Then
             Dim ParentPathChain As String = ""
             For MyCounter As Integer = 1 To parentLevel
                 ParentPathChain &= ".." & System.IO.Path.DirectorySeparatorChar
@@ -302,7 +302,7 @@ Friend NotInheritable Class Tools
         If value = Nothing Then
             Return alternativeChoice
         Else
-            Return value.ToString
+            Return value.ToString(System.Globalization.CultureInfo.InvariantCulture)
         End If
     End Function
 
@@ -407,7 +407,7 @@ Friend NotInheritable Class Tools
     ''' <returns></returns>
     Public Shared Function ReplaceAtEndOfString(text As String, searchValue As String, replacement As String) As String
         If text = Nothing OrElse searchValue = Nothing OrElse text.Length < searchValue.Length Then Return text
-        If text.EndsWith(searchValue) Then
+        If text.EndsWith(searchValue, False, System.Globalization.CultureInfo.InvariantCulture) Then
             Return text.Substring(0, text.Length - searchValue.Length) & replacement
         Else
             Return text
diff --git a/README.md b/README.md
index 7b7fadb..74e3699 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,9 @@ Run (long-running) Tasks and optionally visualize them
     * FirstStepsWhichCanBeRolledBack
     * SecondStepsWithoutRollbackOption
     * RollbackSteps
-  * will run only if previous task items completed without critical failures
+  * will run 
+    * only if previous task items completed without critical failures
+    * or always
 * Task bundles 
   * might run 
     * successfull,