diff --git a/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat.slnx b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat.slnx
new file mode 100644
index 00000000..3591f01c
--- /dev/null
+++ b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat.slnx	
@@ -0,0 +1,3 @@
+<Solution>
+  <Project Path="ColumnNumberFormat/ColumnNumberFormat.csproj" />
+</Solution>
diff --git a/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/ColumnNumberFormat.csproj b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/ColumnNumberFormat.csproj
new file mode 100644
index 00000000..4f712b50
--- /dev/null
+++ b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/ColumnNumberFormat.csproj	
@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.XlsIO.Net.Core" Version="*" />
+  </ItemGroup>
+
+  <ItemGroup>
+	<None Update="Output\*">
+		<CopyToOutputDirectory>Always</CopyToOutputDirectory>
+	</None>
+	<None Update="Data\*">
+		<CopyToOutputDirectory>Always</CopyToOutputDirectory>
+	</None>
+  </ItemGroup>
+</Project>
diff --git a/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Data/Input.xlsx b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Data/Input.xlsx
new file mode 100644
index 00000000..df050faa
Binary files /dev/null and b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Data/Input.xlsx differ
diff --git a/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Output/.gitkeep b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Output/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Program.cs b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Program.cs
new file mode 100644
index 00000000..847639e8
--- /dev/null
+++ b/FAQ/Column Number Format/.NET/ColumnNumberFormat/ColumnNumberFormat/Program.cs	
@@ -0,0 +1,31 @@
+using Syncfusion.XlsIO;
+
+namespace ColumnNumberFormat
+{
+    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.Open(Path.GetFullPath(@"Data/Input.xlsx"));
+                IWorksheet sheet = workbook.Worksheets[0];
+
+                //Case 1: Apply direct number format (zero-based index)
+                sheet.Columns[0].NumberFormat = "yyyy-mm-dd"; //Column A
+                sheet.Columns[3].NumberFormat = "$#,##0.00"; //Column D
+                sheet.Columns[4].NumberFormat = "0.00%"; //Column E
+
+                //Case 2: Apply style-based format (one-based index)
+                IStyle style = workbook.Styles.Add("DecimalStyle");
+                style.NumberFormat = "0.00";
+                sheet.SetDefaultColumnStyle(3, style); //Column C 
+
+                //Saving the workbook
+                workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+            }
+        }
+    }
+}
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