1009870- add FileExtension FAQ

Author: GowthamPonrajSF5414

Document-Processing-toc.html

@@ -6424,6 +6424,9 @@
 									<li>
 										<a href="/document-processing/excel/excel-library/net/faqs/how-to-get-the-maximum-supported-rows-and-columns-in-an-excel-worksheet">How to get the maximum rows and columns in a worksheet using XlsIO?</a>
 									</li>
+									<li>
+										<a href="/document-processing/excel/excel-library/net/faqs/how-to-get-the-file-extension-of-excel-file">How to get the file extension of an Excel file using XlsIO?</a>
+									</li>
 								</ul>
 							</li>
 						</ul>

Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-the-file-extension-of-excel-file.md

@@ -0,0 +1,52 @@
+---
+title: How to get file extension of an Excel file | XlsIO | Syncfusion
+description: This page explains how to get the file extension of an Excel file using the Syncfusion .NET Excel library (XlsIO).
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to get the file extension of an Excel file using XlsIO?
+
+When an Excel file is opened with XlsIO, you can obtain its full path and extension from the [WorkbookImpl.FullFileName](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.Implementation.WorkbookImpl.html#Syncfusion_XlsIO_Implementation_WorkbookImpl_FullFileName) property. The following code snippet illustrates this.
+
+{% tabs %}  
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    IWorkbook workbook = application.Workbooks.Open("Sample.xlsx");
+    
+    string fileName = (workbook as WorkbookImpl).FullFileName;
+    
+    // Display file extension of excel file
+    Console.WriteLine(Path.GetExtension(fileName));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    IWorkbook workbook = application.Workbooks.Open("Sample.xlsx");
+    
+    string fileName = (workbook as WorkbookImpl).FullFileName;
+    
+    // Display file extension of excel file
+    Console.WriteLine(Path.GetExtension(fileName));
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+    Dim workbook As IWorkbook = application.Workbooks.Open("Sample.xlsx")
+
+    Dim fileName As String = CType(workbook, WorkbookImpl).FullFileName
+    
+    ' Display file extension of excel file
+    Console.WriteLine(Path.GetExtension(fileName))
+End Using
+{% endhighlight %}
+{% endtabs %}  
+