265097-How to create Excel treemap chart in C#, VB.NET?

Use Cases/Treemap Chart/.NET/Treemap Chart/Treemap Chart.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36127.28 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Treemap Chart", "Treemap Chart\Treemap Chart.csproj", "{73C5B991-9621-410D-87DD-4F755A680AB9}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{73C5B991-9621-410D-87DD-4F755A680AB9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{73C5B991-9621-410D-87DD-4F755A680AB9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{73C5B991-9621-410D-87DD-4F755A680AB9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{73C5B991-9621-410D-87DD-4F755A680AB9}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {66A54742-813A-4178-8923-906073B4602F}
+	EndGlobalSection
+EndGlobal

Use Cases/Treemap Chart/.NET/Treemap Chart/Treemap Chart/Program.cs

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+using Syncfusion.XlsIO;
+
+namespace Treemap_Chart
+{
+    class Program
+    {
+        public static void Main(string[] args)
+        {
+            using (ExcelEngine excelEngine = new ExcelEngine())
+            {
+                IApplication application = excelEngine.Excel;
+                application.DefaultVersion = ExcelVersion.Xlsx;
+                IWorkbook workbook = application.Workbooks.Create(1);
+                IWorksheet worksheet = workbook.Worksheets[0];
+
+                //Enter sample data
+                worksheet.Range["A1"].Text = "Category";
+                worksheet.Range["B1"].Text = "SubCategory";
+                worksheet.Range["C1"].Text = "Value";
+
+                worksheet.Range["A2"].Text = "Fruit";
+                worksheet.Range["B2"].Text = "Apple";
+                worksheet.Range["C2"].Number = 50;
+
+                worksheet.Range["A3"].Text = "Fruit";
+                worksheet.Range["B3"].Text = "Banana";
+                worksheet.Range["C3"].Number = 30;
+
+                worksheet.Range["A4"].Text = "Vegetable";
+                worksheet.Range["B4"].Text = "Carrot";
+                worksheet.Range["C4"].Number = 40;
+
+                worksheet.Range["A5"].Text = "Vegetable";
+                worksheet.Range["B5"].Text = "Broccoli";
+                worksheet.Range["C5"].Number = 25;
+
+                //Add chart to worksheet
+                IChartShape chart = worksheet.Charts.Add();
+
+                //Set chart type to Treemap
+                chart.ChartType = ExcelChartType.TreeMap;
+
+                //Set chart data range
+                chart.DataRange = worksheet.Range["A1:C5"];
+                chart.IsSeriesInRows = false;
+
+                //Set chart title
+                chart.ChartTitle = "Treemap Chart";
+
+                //Positioning the chart in the worksheet
+                chart.TopRow = 8;
+                chart.LeftColumn = 1;
+                chart.BottomRow = 23;
+                chart.RightColumn = 8;
+
+                #region Save
+                //Saving the workbook
+                FileStream outputStream = new FileStream(Path.GetFullPath("Output.xlsx"), FileMode.Create, FileAccess.Write);
+                workbook.SaveAs(outputStream);
+                #endregion
+
+                //Dispose streams
+                outputStream.Dispose();
+            }
+        }
+    }
+}

Use Cases/Treemap Chart/.NET/Treemap Chart/Treemap Chart/Treemap Chart.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Treemap_Chart</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.XlsIO.Net.Core" Version="*" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="Output\*">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>