diff --git a/Infrastructure/UI/Resources/ItemEditPanels.xaml b/Infrastructure/UI/Resources/ItemEditPanels.xaml
index b5745f6..4cc12ba 100644
--- a/Infrastructure/UI/Resources/ItemEditPanels.xaml
+++ b/Infrastructure/UI/Resources/ItemEditPanels.xaml
@@ -15,8 +15,8 @@
                 <Button Content=">>" Command="{Binding AddSelected}"/>
                 <Button Content="&lt;&lt;" Command="{Binding RemoveSelected}"/>
             </StackPanel>
-            <ListBox Grid.Column="2" ItemsSource="{Binding TargetItems}" SelectedItem="{Binding SelectedTargetItem}" ItemTemplate="{StaticResource ResourceKey=SimpleItemTemplate}"/>
+            <ListBox Grid.Column="2" ItemsSource="{Binding TargetItems}"
+                     SelectedItem="{Binding SelectedTargetItem}" ItemTemplate="{StaticResource ResourceKey=SimpleItemTemplate}"/>
         </Grid>
     </DataTemplate>
-
 </ResourceDictionary>
\ No newline at end of file
diff --git a/Libraries/LoaderCalculator.dll b/Libraries/LoaderCalculator.dll
index e96c3f0..f87555f 100644
Binary files a/Libraries/LoaderCalculator.dll and b/Libraries/LoaderCalculator.dll differ
diff --git a/StructureHelperCommon/Infrastructures/Strings/ErrorString.cs b/StructureHelperCommon/Infrastructures/Strings/ErrorString.cs
index db8746f..8fb5f97 100644
--- a/StructureHelperCommon/Infrastructures/Strings/ErrorString.cs
+++ b/StructureHelperCommon/Infrastructures/Strings/ErrorString.cs
@@ -16,5 +16,7 @@ namespace StructureHelperCommon.Infrastructures.Strings
         public static string LimitStatesIsNotValid => "#0005: Type of limite state is not valid";
         public static string LoadTermIsNotValid => "#0006: Load term is not valid";
         public static string IncorrectValue => "#0007: value is not valid";
+        public static string FileCantBeDeleted => "#0008: File can't be deleted";
+        public static string FileCantBeSaved => "#0009: File can't be saved";
     }
 }
diff --git a/StructureHelperCommon/Models/Forces/ForceCombinationList.cs b/StructureHelperCommon/Models/Forces/ForceCombinationList.cs
index 75c70ae..c6cd760 100644
--- a/StructureHelperCommon/Models/Forces/ForceCombinationList.cs
+++ b/StructureHelperCommon/Models/Forces/ForceCombinationList.cs
@@ -27,5 +27,21 @@ namespace StructureHelperCommon.Models.Forces
             DesignForces.Add(new DesignForceTuple(LimitStates.SLS, CalcTerms.ShortTerm));
             DesignForces.Add(new DesignForceTuple(LimitStates.SLS, CalcTerms.LongTerm));
         }
+
+        public object Clone()
+        {
+            var newItem = new ForceCombinationList();
+            newItem.Name = Name + " copy";
+            newItem.SetInGravityCenter = SetInGravityCenter;
+            newItem.ForcePoint.X = ForcePoint.X;
+            newItem.ForcePoint.Y = ForcePoint.Y;
+            newItem.DesignForces.Clear();
+            foreach (var item in DesignForces)
+            {
+                var newForce = item.Clone() as IDesignForceTuple;
+                newItem.DesignForces.Add(newForce);
+            }
+            return newItem;
+        }
     }
 }
diff --git a/StructureHelperCommon/Models/Forces/IForceCombinationList.cs b/StructureHelperCommon/Models/Forces/IForceCombinationList.cs
index fd4d056..8a89573 100644
--- a/StructureHelperCommon/Models/Forces/IForceCombinationList.cs
+++ b/StructureHelperCommon/Models/Forces/IForceCombinationList.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperCommon.Models.Forces
 {
-    public interface IForceCombinationList
+    public interface IForceCombinationList : ICloneable
     {
         string Name { get; set; }
         bool SetInGravityCenter { get; set; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
index a8aaa7f..83095e9 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
@@ -132,6 +132,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
         public object Clone()
         {
             IForceCalculator calculator = new ForceCalculator();
+            calculator.Name = Name + " copy";
             calculator.LimitStatesList.Clear();
             calculator.LimitStatesList.AddRange(LimitStatesList);
             calculator.CalcTermsList.Clear();
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
index b627f0a..a7555f3 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
@@ -7,7 +7,7 @@ using System.Collections.Generic;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForceCalculator : INdmCalculator, IHasPrimitives, IHasForceCombinations, ICloneable
+    public interface IForceCalculator : INdmCalculator, IHasPrimitives, IHasForceCombinations
     {
         List<CalcTerms> CalcTermsList { get; }
         double IterationAccuracy { get; set; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs
new file mode 100644
index 0000000..8138b93
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs
@@ -0,0 +1,75 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Strings;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses
+{
+    public class ExportToCSVLogic : IExportResultLogic
+    {
+        string filename;
+
+        public void Export(INdmResult ndmResult)
+        {
+            string separator = ";";
+            StringBuilder output = new StringBuilder();
+
+            if (ndmResult is ForcesResults)
+            {
+                var forceResults = ndmResult as ForcesResults;
+                string[] headings =
+                    {
+                    "Limit State",
+                    "Calc duration",
+                    "Mx",
+                    "My",
+                    "Nz",
+                    "kx",
+                    "ky",
+                    "epsz"
+                };
+                output.AppendLine(string.Join(separator, headings));
+                foreach (var item in forceResults.ForcesResultList)
+                {
+                    if (item.IsValid == true)
+                    {
+                        var tuple = item.DesignForceTuple.ForceTuple;
+                        var strainMatrix = item.LoaderResults.StrainMatrix;
+                        string[] newLine =
+                            {
+                            item.DesignForceTuple.LimitState.ToString(),
+                            item.DesignForceTuple.CalcTerm.ToString(),
+                            tuple.Mx.ToString(),
+                            tuple.My.ToString(),
+                            tuple.Nz.ToString(),
+                            strainMatrix.Kx.ToString(),
+                            strainMatrix.Ky.ToString(),
+                            strainMatrix.EpsZ.ToString()
+                        };
+                        output.AppendLine(string.Join(separator, newLine));
+                    }
+                }
+                try
+                {
+                    File.AppendAllText(filename, output.ToString());
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine("Data could not be written to the CSV file.");
+                    return;
+                }
+            }
+            else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown +": "+ nameof(ndmResult));
+        }
+
+        public ExportToCSVLogic(string filename)
+        {
+            this.filename = filename;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
index 6599e39..a3d927a 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses
 {
-    internal interface IExportResultLogic
+    public interface IExportResultLogic
     {
         void Export(INdmResult ndmResult);
     }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs
index 641739b..dc431ab 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs
@@ -9,7 +9,7 @@ using TaskManager;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses
 {
-    public interface INdmCalculator
+    public interface INdmCalculator : ICloneable
     {
         string Name { get; set; }
         /// <summary>
diff --git a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
index 9f1f3b3..b84e77d 100644
--- a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
+++ b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
@@ -55,17 +55,14 @@
                     </Grid.ColumnDefinitions>
                     <ListBox ItemsSource="{Binding AllowedPrimitives}"
                              SelectedItem="{Binding SelectedAllowedPrimitive}"
-                             ItemTemplate="{StaticResource ColoredItemTemplate}">
-                    </ListBox>
+                             ItemTemplate="{StaticResource ColoredItemTemplate}"/>
                     <StackPanel Grid.Column="1">
                         <Button Content="Add all" Command="{Binding AddAllPrimitivesCommand}"/>
                         <Button Content="Clear all" Command="{Binding ClearAllPrimitivesCommand}"/>
                         <Button Content=">>" Command="{Binding AddSelectedPrimitiveCommand}"/>
                         <Button Content="&lt;&lt;" Command="{Binding RemoveSelectedPrimitiveCommand}"/>
                     </StackPanel>
-                    <ListBox Grid.Column="2" ItemsSource="{Binding Primitives}" SelectedItem="{Binding SelectedPrimitive}" ItemTemplate="{StaticResource ColoredItemTemplate}">
-
-                    </ListBox>
+                    <ListBox Grid.Column="2" ItemsSource="{Binding Primitives}" SelectedItem="{Binding SelectedPrimitive}" ItemTemplate="{StaticResource ColoredItemTemplate}"/>
                 </Grid>
             </TabItem>
             <TabItem Header="Iterations">
diff --git a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
index d840d9c..546c45c 100644
--- a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
+++ b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
@@ -7,11 +7,11 @@
         xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Calculations.Calculators"
         d:DataContext="{d:DesignInstance vm:ForcesResultsViewModel}"
         mc:Ignorable="d"
-        Title="ForceResultsView" Height="350" Width="650" MinHeight="300" MinWidth="400" WindowStartupLocation="CenterScreen">
+        Title="Calculation Results" Height="350" Width="850" MinHeight="300" MinWidth="400" WindowStartupLocation="CenterScreen">
     <Grid>
         <Grid.ColumnDefinitions>
             <ColumnDefinition/>
-            <ColumnDefinition Width="60"/>
+            <ColumnDefinition Width="90"/>
         </Grid.ColumnDefinitions>
         <DataGrid x:Name="ResultGrid" IsReadOnly="True" AutoGenerateColumns="False"  ItemsSource="{Binding ForcesResults.ForcesResultList}" SelectedItem="{Binding SelectedResult}" >
             <DataGrid.RowStyle>
diff --git a/Windows/MainWindow/MainView.xaml b/Windows/MainWindow/MainView.xaml
index 5915f71..e382fee 100644
--- a/Windows/MainWindow/MainView.xaml
+++ b/Windows/MainWindow/MainView.xaml
@@ -72,6 +72,7 @@
                         <ListBox.ContextMenu>
                             <ContextMenu>
                                 <Button Content="Edit" Command="{Binding Edit}"/>
+                                <Button Content="Copy" Command="{Binding Copy}"/>
                                 <Button Content="Delete" Command="{Binding Delete}"/>
                             </ContextMenu>
                         </ListBox.ContextMenu>
@@ -122,6 +123,7 @@
                             <ContextMenu>
                                 <Button Content="Run" Command="{Binding Run}"/>
                                 <Button Content="Edit" Command="{Binding Edit}"/>
+                                <Button Content="Copy" Command="{Binding Copy}"/>
                                 <Button Content="Delete" Command="{Binding Delete}"/>
                             </ContextMenu>
                         </ListBox.ContextMenu>
diff --git a/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs b/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
index f801e82..61042cc 100644
--- a/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
+++ b/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
@@ -7,12 +7,16 @@ using StructureHelper.Services.Reports;
 using StructureHelper.Services.Reports.CalculationReports;
 using StructureHelper.Services.ResultViewers;
 using StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalculatorViews;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Strings;
+using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using StructureHelperLogics.Services.NdmCalculations;
 using StructureHelperLogics.Services.NdmPrimitives;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -59,12 +63,48 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                 return exportToCSVCommand ??
                     (exportToCSVCommand = new RelayCommand(o =>
                     {
-
+                        ExportToCSV();
                     }
                     ));
             }
         }
 
+        private void ExportToCSV()
+        {
+            SaveFileDialog saveFileDialog = new SaveFileDialog();
+            saveFileDialog.Filter = "csv |*.csv";
+            saveFileDialog.Title = "Save an Image File";
+            if (saveFileDialog.ShowDialog() == DialogResult.OK)
+            {
+                var filename = saveFileDialog.FileName;
+                // If the file name is not an empty string open it for saving.
+                if (filename != "")
+                {
+                    if (File.Exists(filename))
+                    {
+                        try
+                        {
+                            File.Delete(filename);
+                        }
+                        catch (Exception ex)
+                        {
+                            throw new StructureHelperException(ErrorStrings.FileCantBeDeleted + ex + filename);
+                        }
+                    }
+
+                    try
+                    {
+                        var logic = new ExportToCSVLogic(saveFileDialog.FileName);
+                        logic.Export(forcesResults);
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new StructureHelperException(ErrorStrings.FileCantBeSaved + ex + filename);
+                    }
+                }
+            }
+        }
+
         public RelayCommand InterpolateCommand
         {
             get
@@ -91,7 +131,7 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
             {
                 var vm = new ForcesResultsViewModel(calculator);
                 var wnd = new ForceResultsView(vm);
-                wnd.Show();
+                wnd.ShowDialog();
             }
         }
 
diff --git a/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs b/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
index 645275c..c453a47 100644
--- a/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
+++ b/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
@@ -50,8 +50,12 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                     (
                     editCalculatorCommand = new RelayCommand(o =>
                     {
+                        var tmpSelected = SelectedItem;
                         EditCalculator();
+                        Items.Clear();
+                        AddItems(repository.CalculatorsList);
                         OnPropertyChanged(nameof(Items));
+                        SelectedItem = tmpSelected;
                     }, o => SelectedItem != null));
             }
         }
@@ -68,6 +72,8 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
         }
         private RelayCommand deleteCalculatorCommand;
         private RelayCommand runCommand;
+        private RelayCommand copyCalculatorCommand;
+
         public RelayCommand Delete
         {
             get
@@ -100,13 +106,27 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                         var calculator = SelectedItem as IForceCalculator;
                         var vm = new ForcesResultsViewModel(calculator);
                         var wnd = new ForceResultsView(vm);
-                        wnd.Show();
+                        wnd.ShowDialog();
                     }
                 }, o => SelectedItem != null));
             }
         }
 
-        public RelayCommand Copy => throw new NotImplementedException();
+        public RelayCommand Copy
+        {
+            get
+            {
+                return copyCalculatorCommand ??
+                (
+                copyCalculatorCommand = new RelayCommand(o =>
+                {
+                    var item = SelectedItem.Clone() as INdmCalculator;
+                    repository.CalculatorsList.Add(item);
+                    Items.Add(item);
+                    OnPropertyChanged(nameof(Items));
+                }, o => SelectedItem != null));
+            }
+        }
 
         private void DeleteCalculator()
         {
diff --git a/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs b/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
index c104eb4..31af3a2 100644
--- a/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
+++ b/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
@@ -3,6 +3,7 @@ using StructureHelper.Windows.Forces;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.Calculations.CalculationProperties;
 using StructureHelperLogics.Models.CrossSections;
+using StructureHelperLogics.NdmCalculations.Analyses;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -65,6 +66,8 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
             }
         }
         private RelayCommand editForceCombinationCommand;
+        private RelayCommand copyCommand;
+
         public RelayCommand Edit
         {
             get
@@ -74,12 +77,28 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                     editForceCombinationCommand = new RelayCommand(o =>
                     {
                         EditForceCombination();
+                        Items.Clear();
+                        AddItems(repository.ForceCombinationLists);
                         OnPropertyChanged(nameof(Items));
                     }, o => SelectedItem != null));
             }
         }
 
-        public RelayCommand Copy => throw new NotImplementedException();
+        public RelayCommand Copy
+        {
+            get
+            {
+                return copyCommand ??
+                (
+                copyCommand = new RelayCommand(o =>
+                {
+                    var item = SelectedItem.Clone() as IForceCombinationList;
+                    repository.ForceCombinationLists.Add(item);
+                    Items.Add(item);
+                    OnPropertyChanged(nameof(Items));
+                }, o => SelectedItem != null));
+            }
+        }
 
         private void EditForceCombination()
         {