From c6ce3d2c1b22445ef5a94c3285175d5ac4355b74 Mon Sep 17 00:00:00 2001
From: KarthikaSF4773 <karthika.santhanakrishnan@syncfusion.com>
Date: Thu, 18 Dec 2025 12:33:00 +0530
Subject: [PATCH] 999551-PreserveLeadingZerosSample

---
 .../PreserveLeadingZeros.slnx                 |  3 +++
 .../PreserveLeadingZeros/Data/Input.csv       |  7 ++++++
 .../PreserveLeadingZeros/Output/.gitkeep      |  0
 .../PreserveLeadingZeros.csproj               | 23 +++++++++++++++++
 .../PreserveLeadingZeros/Program.cs           | 25 +++++++++++++++++++
 5 files changed, 58 insertions(+)
 create mode 100644 CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros.slnx
 create mode 100644 CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Data/Input.csv
 create mode 100644 CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Output/.gitkeep
 create mode 100644 CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/PreserveLeadingZeros.csproj
 create mode 100644 CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Program.cs

diff --git a/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros.slnx b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros.slnx
new file mode 100644
index 00000000..2b43b590
--- /dev/null
+++ b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros.slnx	
@@ -0,0 +1,3 @@
+<Solution>
+  <Project Path="PreserveLeadingZeros/PreserveLeadingZeros.csproj" />
+</Solution>
diff --git a/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Data/Input.csv b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Data/Input.csv
new file mode 100644
index 00000000..6597a7d0
--- /dev/null
+++ b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Data/Input.csv	
@@ -0,0 +1,7 @@
+"Employee ID","Last Name","Mixed_N_String"
+1,"Davolio","00123"
+2,"Fuller","00123"
+3,"Leverling","00123"
+4,"Peacock","00123"
+5,"Buchanan","abcde"
+6,"Suyama","abcde"
diff --git a/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Output/.gitkeep b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Output/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/PreserveLeadingZeros.csproj b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/PreserveLeadingZeros.csproj
new file mode 100644
index 00000000..39a86120
--- /dev/null
+++ b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/PreserveLeadingZeros.csproj	
@@ -0,0 +1,23 @@
+<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/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Program.cs b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Program.cs
new file mode 100644
index 00000000..2937763c
--- /dev/null
+++ b/CSV to Excel/Preserve Leading Zeros/.NET/PreserveLeadingZeros/PreserveLeadingZeros/Program.cs	
@@ -0,0 +1,25 @@
+using Syncfusion.XlsIO;
+
+namespace PreserveLeadingZeros
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            using (ExcelEngine excelEngine = new ExcelEngine())
+            {
+                IApplication application = excelEngine.Excel;
+                application.DefaultVersion = ExcelVersion.Xlsx;
+                application.PreserveCSVDataTypes = true;
+
+                //Enable KeepLeadingZeros property 
+                application.KeepLeadingZeros = true;
+
+                IWorkbook workbook = application.Workbooks.Open(Path.GetFullPath(@"Data/Input.csv"), ",");
+                
+                //Save the workbook 
+                workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+            }
+        }
+    }
+}
\ No newline at end of file