diff --git a/FileFormat.Cells.sln b/FileFormat.Cells.sln
index 168c736..fdd15dc 100644
--- a/FileFormat.Cells.sln
+++ b/FileFormat.Cells.sln
@@ -1,24 +1,29 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 25.0.1705.6
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34607.119
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileFormat.Cells", "FileFormat.Cells\FileFormat.Cells.csproj", "{347E8540-1317-4E99-BF8A-A16A04E753BB}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FileFormat.Cells", "FileFormat.Cells\FileFormat.Cells.csproj", "{347E8540-1317-4E99-BF8A-A16A04E753BB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileFormat.Cells_Tests", "FileFormat.Cells_Tests\FileFormat.Cells_Tests.csproj", "{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FileFormat.Cells_Tests", "FileFormat.Cells_Tests\FileFormat.Cells_Tests.csproj", "{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
+		netcore3.1|Any CPU = netcore3.1|Any CPU
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{347E8540-1317-4E99-BF8A-A16A04E753BB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{347E8540-1317-4E99-BF8A-A16A04E753BB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{347E8540-1317-4E99-BF8A-A16A04E753BB}.netcore3.1|Any CPU.ActiveCfg = netcore3.1|Any CPU
+		{347E8540-1317-4E99-BF8A-A16A04E753BB}.netcore3.1|Any CPU.Build.0 = netcore3.1|Any CPU
 		{347E8540-1317-4E99-BF8A-A16A04E753BB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{347E8540-1317-4E99-BF8A-A16A04E753BB}.Release|Any CPU.Build.0 = Release|Any CPU
 		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.netcore3.1|Any CPU.ActiveCfg = netcore3.1|Any CPU
+		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.netcore3.1|Any CPU.Build.0 = netcore3.1|Any CPU
 		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A9BFD275-A6CD-4CD7-B039-8CB29CDE5C93}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
diff --git a/FileFormat.Cells/Cell.cs b/FileFormat.Cells/Cell.cs
index a4dd1b8..a365eef 100644
--- a/FileFormat.Cells/Cell.cs
+++ b/FileFormat.Cells/Cell.cs
@@ -2,12 +2,16 @@
 using DocumentFormat.OpenXml;
 using System.Globalization;
 using DocumentFormat.OpenXml.Spreadsheet;
+using DocumentFormat.OpenXml.Packaging;
 
 namespace FileFormat.Cells
 {
     public sealed class Cell
     {
+
         private readonly DocumentFormat.OpenXml.Spreadsheet.Cell _cell;
+        private readonly WorkbookPart _workbookPart;
+
         private readonly SheetData _sheetData;
 
         /// <summary>
@@ -23,10 +27,11 @@ public sealed class Cell
         /// <exception cref="ArgumentNullException">
         /// Thrown when <paramref name="cell"/> or <paramref name="sheetData"/> is null.
         /// </exception>
-        public Cell(DocumentFormat.OpenXml.Spreadsheet.Cell cell, SheetData sheetData)
+        public Cell(DocumentFormat.OpenXml.Spreadsheet.Cell cell, SheetData sheetData, WorkbookPart workbookPart)
         {
             _cell = cell ?? throw new ArgumentNullException(nameof(cell));
             _sheetData = sheetData ?? throw new ArgumentNullException(nameof(sheetData));
+            _workbookPart = workbookPart ?? throw new ArgumentNullException(nameof(workbookPart));
         }
 
         /// <summary>
@@ -82,9 +87,20 @@ public void PutFormula(string formula)
         /// Gets the value of the cell.
         /// </summary>
         /// <returns>The cell value as a string.</returns>
-        public string GetValue()
-        {
-            return _cell.CellValue?.Text;
+        public string GetValue()
+        {
+            if (_cell == null || _cell.CellValue == null) return "";
+
+            if (_cell.DataType != null && _cell.DataType.Value == CellValues.SharedString)
+            {
+                int index = int.Parse(_cell.CellValue.Text);
+                SharedStringTablePart sharedStrings = _workbookPart.SharedStringTablePart;
+                return sharedStrings.SharedStringTable.ElementAt(index).InnerText;
+            }
+            else
+            {
+                return _cell.CellValue.Text;
+            }
         }
 
         /// <summary>
diff --git a/FileFormat.Cells/FileFormat.Cells.csproj b/FileFormat.Cells/FileFormat.Cells.csproj
index dbf4e0d..2f6f421 100644
--- a/FileFormat.Cells/FileFormat.Cells.csproj
+++ b/FileFormat.Cells/FileFormat.Cells.csproj
@@ -1,14 +1,27 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.1</TargetFramework>
-	  <LangVersion>10.0</LangVersion>  
+	   
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <Configurations>Debug;Release;netcore3.1</Configurations>
   </PropertyGroup>
 
-  <ItemGroup>
+	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+	
+	</PropertyGroup>
+
+	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+		<PlatformTarget>AnyCPU</PlatformTarget>
+	</PropertyGroup>
+	<PropertyGroup>
+		<LangVersion>10.0</LangVersion>
+	</PropertyGroup>
+
+
+	<ItemGroup>
     <PackageReference Include="DocumentFormat.OpenXml" Version="2.20.0" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/FileFormat.Cells/Image.cs b/FileFormat.Cells/Image.cs
index 1fbf54f..4a27e02 100644
--- a/FileFormat.Cells/Image.cs
+++ b/FileFormat.Cells/Image.cs
@@ -6,7 +6,9 @@
 using A14 = DocumentFormat.OpenXml.Office2010.Drawing;
 using DocumentFormat.OpenXml.Spreadsheet;
 using System.Linq;
-
+using System.IO;
+using System;
+
 namespace FileFormat.Cells
 {
 
diff --git a/FileFormat.Cells/ImageHandler.cs b/FileFormat.Cells/ImageHandler.cs
index 70d29ac..6ffd1f4 100644
--- a/FileFormat.Cells/ImageHandler.cs
+++ b/FileFormat.Cells/ImageHandler.cs
@@ -7,7 +7,9 @@
 using DocumentFormat.OpenXml.Spreadsheet;
 using System.Linq;
 using DocumentFormat.OpenXml.Drawing.Spreadsheet;
-
+using System;
+using System.IO;
+
 namespace FileFormat.Cells
 {
     public class ImageHandler
diff --git a/FileFormat.Cells/Properties/launchSettings.json b/FileFormat.Cells/Properties/launchSettings.json
new file mode 100644
index 0000000..b91e10e
--- /dev/null
+++ b/FileFormat.Cells/Properties/launchSettings.json
@@ -0,0 +1,37 @@
+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:13841",
+      "sslPort": 44390
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5061",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true
+    },
+    "https": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7274;http://localhost:5061",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/FileFormat.Cells/Workbook.cs b/FileFormat.Cells/Workbook.cs
index 7cf33d8..455dbd7 100644
--- a/FileFormat.Cells/Workbook.cs
+++ b/FileFormat.Cells/Workbook.cs
@@ -58,7 +58,7 @@ public Workbook()
 
             // Adding your Worksheet object to Worksheets list
             //var newWorksheet = new Worksheet(worksheetPart, worksheetPart.Worksheet);
-            var newWorksheet = Worksheet.WorksheetFactory.CreateInstance(worksheetPart, worksheetPart.Worksheet);
+            var newWorksheet = Worksheet.WorksheetFactory.CreateInstance(worksheetPart, worksheetPart.Worksheet, workbookpart);
             this.Worksheets.Add(newWorksheet);
 
             this.stylesPart = this.spreadsheetDocument.WorkbookPart.AddNewPart<WorkbookStylesPart>();
@@ -124,8 +124,9 @@ private void InitializeWorksheets()
             {
                 var worksheetPart = (WorksheetPart)(this.workbookpart.GetPartById(sheet.Id));
                 var worksheet = worksheetPart.Worksheet;
+                var workbookPart = this.workbookpart;
                 var sheetData = worksheet.Elements<SheetData>().FirstOrDefault() ?? new SheetData();
-                this.Worksheets.Add(Worksheet.WorksheetFactory.CreateInstance(worksheetPart, worksheetPart.Worksheet));
+                this.Worksheets.Add(Worksheet.WorksheetFactory.CreateInstance(worksheetPart, worksheetPart.Worksheet, workbookPart));
             }
         }
 
@@ -228,7 +229,7 @@ public Worksheet AddSheet(string sheetName)
             newWorksheetPart.Worksheet = new DocumentFormat.OpenXml.Spreadsheet.Worksheet(sheetData);
 
             // Create a new Worksheet object and add it to Worksheets list
-            var newWorksheet = Worksheet.WorksheetFactory.CreateInstance(newWorksheetPart, newWorksheetPart.Worksheet);
+            var newWorksheet = Worksheet.WorksheetFactory.CreateInstance(newWorksheetPart, newWorksheetPart.Worksheet, this.workbookpart);
             this.Worksheets.Add(newWorksheet);
 
             // Append a new sheet and associate it with the workbook
@@ -286,7 +287,7 @@ private void SyncWorksheets()
                 var wp = (WorksheetPart)(this.workbookpart.GetPartById(sh.Id));
                 var ws = wp.Worksheet;
                 var sd = ws.Elements<SheetData>().FirstOrDefault() ?? new SheetData();
-                this.Worksheets.Add(Worksheet.WorksheetFactory.CreateInstance(wp, wp.Worksheet));
+                this.Worksheets.Add(Worksheet.WorksheetFactory.CreateInstance(wp, wp.Worksheet, this.workbookpart));
             }
         }
 
diff --git a/FileFormat.Cells/Worksheet.cs b/FileFormat.Cells/Worksheet.cs
index 8d3056f..a16f663 100644
--- a/FileFormat.Cells/Worksheet.cs
+++ b/FileFormat.Cells/Worksheet.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
 using DocumentFormat.OpenXml;
@@ -16,11 +18,11 @@ public sealed class Worksheet
     {
         private WorksheetPart _worksheetPart;
         private SheetData _sheetData;
-
+        private DocumentFormat.OpenXml.Spreadsheet.Cell sourceCell;
         public const double DefaultColumnWidth = 8.43; // Default width in character units
         public const double DefaultRowHeight = 15.0;   // Default height in points
 
-
+        private WorkbookPart _workbookPart;
         /// <summary>
         /// Gets the CellIndexer for the worksheet. This property provides indexed access to the cells of the worksheet.
         /// </summary>
@@ -41,15 +43,17 @@ public sealed class Worksheet
         /// <exception cref="InvalidOperationException">
         /// Thrown if SheetData is not found in the provided worksheet.
         /// </exception>
-        private Worksheet(WorksheetPart worksheetPart, DocumentFormat.OpenXml.Spreadsheet.Worksheet worksheet)
+        private Worksheet(WorksheetPart worksheetPart, DocumentFormat.OpenXml.Spreadsheet.Worksheet worksheet, WorkbookPart workbookPart)
         {
             _worksheetPart = worksheetPart ?? throw new ArgumentNullException(nameof(worksheetPart));
 
             _sheetData = worksheet?.Elements<SheetData>().FirstOrDefault()
                          ?? throw new InvalidOperationException("SheetData not found in the worksheet.");
+            _workbookPart = workbookPart ?? throw new ArgumentNullException(nameof(workbookPart));
 
             // Initialize the Cells property
             this.Cells = new CellIndexer(this);
+         
         }
 
         /// <summary>
@@ -61,9 +65,9 @@ private Worksheet(WorksheetPart worksheetPart, DocumentFormat.OpenXml.Spreadshee
         /// <returns>A new instance of the Worksheet class.</returns>
         public class WorksheetFactory
         {
-            public static Worksheet CreateInstance(WorksheetPart worksheetPart, DocumentFormat.OpenXml.Spreadsheet.Worksheet worksheet)
+            public static Worksheet CreateInstance(WorksheetPart worksheetPart, DocumentFormat.OpenXml.Spreadsheet.Worksheet worksheet, WorkbookPart workbookPart)
             {
-                return new Worksheet(worksheetPart, worksheet);
+                return new Worksheet(worksheetPart, worksheet, workbookPart);
             }
         }
 
@@ -123,7 +127,7 @@ public string Name
         public Cell GetCell(string cellReference)
         {
             // This logic used to be in your indexer
-            return new Cell(GetOrCreateCell(cellReference), _sheetData);
+            return new Cell(GetOrCreateCell(cellReference), _sheetData, _workbookPart);
         }
 
         /// <summary>
@@ -1604,8 +1608,36 @@ public void AddComment(string cellReference, Comment comment)
             _worksheetPart.Worksheet.Save();
         }
 
+        public void CopyRange(Range sourceRange, string targetStartCellReference)
+        {
+            var (targetStartRow, targetStartColumn) = ParseCellReference(targetStartCellReference);
+
+            uint rowOffset = targetStartRow - sourceRange.StartRowIndex;
+            uint columnOffset = targetStartColumn - sourceRange.StartColumnIndex;
+
+            for (uint row = sourceRange.StartRowIndex; row <= sourceRange.EndRowIndex; row++)
+            {
+                for (uint column = sourceRange.StartColumnIndex - 1; column < sourceRange.EndColumnIndex; column++)
+                {
+                    // Calculate target cell's row and column indices
+                    uint targetRow = row + rowOffset;
+                    uint targetColumn = column + columnOffset;
+
+                    // Construct source and target cell references
+                    string sourceCellRef = $"{IndexToColumnLetter((int)column)}{row}";
+                    string targetCellRef = $"{IndexToColumnLetter((int)targetColumn)}{targetRow}";
+
+                    this.Cells[targetCellRef].PutValue(this.Cells[sourceCellRef].GetValue());
+                }
+            }
+
+            // Save the worksheet to apply changes
+            _worksheetPart.Worksheet.Save();
+        }
+
         
 
+
     }
 
     public class CellIndexer
@@ -1635,6 +1667,7 @@ public Cell this[string cellReference]
                 return _worksheet.GetCell(cellReference);
             }
         }
+
     }
 }
 
diff --git a/FileFormat.Cells_Tests/FileFormat.Cells_Tests.csproj b/FileFormat.Cells_Tests/FileFormat.Cells_Tests.csproj
index c5dcee2..89db112 100644
--- a/FileFormat.Cells_Tests/FileFormat.Cells_Tests.csproj
+++ b/FileFormat.Cells_Tests/FileFormat.Cells_Tests.csproj
@@ -1,13 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net70</TargetFramework>
 	<LangVersion>10.0</LangVersion> 
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
+    <Configurations>Debug;Release;netcore3.1</Configurations>
   </PropertyGroup>
 
   <ItemGroup>