fixed issue where app crashes when index is out of range,

added message box when an unhandled exception occurred,
decreased minimum window size of whole app

MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.cs

@@ -323,8 +323,11 @@ public class MultiFormatDataView : Control
         {
             // subtracting the counted newline sequences and adding i (length)
             int elementPositionInCollection = selectionStartIndex - foundManuallyIntroducedNewlineSequenceCharacters + i;
-            // add element to new selection list
+            // this item does exist => add it to new selection list
-            newSelection.Add(this.DataSource.Data.ElementAt(elementPositionInCollection));
+            if (this.DataSource.Data.ElementAtOrDefault(elementPositionInCollection) != null)
+            {
+                newSelection.Add(this.DataSource.Data.ElementAt(elementPositionInCollection));
+            }
             // next item does not exist => break loop
             if(this.DataSource.Data.ElementAtOrDefault(elementPositionInCollection + 1) == null)
             {

MultiTerm.Wpf/App.xaml.cs

@@ -101,17 +101,20 @@ public partial class App : Application
     #region Event handlers for hidden exceptions
     private void AppDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
     {
-        logger?.LogException((Exception)e.ExceptionObject, "AppDomain UnhandledException caught", nameof(App));
+        logger?.LogException((Exception)e.ExceptionObject, "AppDomain UnhandledException occurred", nameof(App));
+        MessageBox.Show("Please check logfile. Exception message: \n" + ((Exception)e.ExceptionObject).Message, "AppDomain UnhandledException occurred", MessageBoxButton.OK, MessageBoxImage.Warning);
     }
 
     private void Application_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
     {
-        logger?.LogException(e.Exception, "Application DispatcherUnhandledException caught", nameof(App));
+        logger?.LogException(e.Exception, "Application DispatcherUnhandledException occurred", nameof(App));
+        MessageBox.Show("Please check logfile. Exception message: \n" + e.Exception.Message, "Application DispatcherUnhandledException occurred", MessageBoxButton.OK, MessageBoxImage.Warning);
     }
 
     private void TaskScheduler_UnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
     {
-        logger?.LogException(e.Exception, "TaskScheduler UnobservedTaskException caught", nameof(App));
+        logger?.LogException(e.Exception, "TaskScheduler UnobservedTaskException occurred", nameof(App));
+        MessageBox.Show("Please check logfile. Exception message: \n" + e.Exception.Message, "TaskScheduler UnobservedTaskException occurred", MessageBoxButton.OK, MessageBoxImage.Warning);
     }
     #endregion
 }

MultiTerm.Wpf/MainWindow.xaml

@@ -8,7 +8,7 @@
         xmlns:v="clr-namespace:MultiTerm.Wpf.View"
         mc:Ignorable="d"
         Height="900" Width="1600"
-        MinHeight="900" MinWidth="1600"
+        MinHeight="800" MinWidth="1300"
         Title="MultiTerm"
         Icon="/Assets/mdi-console-white.png"
         FontSize="14">

MultiTerm.Wpf/View/ShellView.xaml

@@ -107,7 +107,7 @@
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="1*"/>
-                <ColumnDefinition Width="6*" MinWidth="1200"/>
+                <ColumnDefinition Width="6*" MinWidth="1000"/>
             </Grid.ColumnDefinitions>
 
             <Grid.Resources>