In this how-to tutorial, we will discuss the conversion procedure between PowerPoint formats using one of the best document converter APIs. We will also provide you the workflow to convert PPT to PPTX using C# and a working code to show you the implementation of the C# PPT to PPTX converter application. You can take a look at the key steps along with the code snippet for converting the document from PPT to PPTX type.

Steps to Convert PPT to PPTX using C#

1. Install GroupDocs.Conversion for .NET package from the NuGet package manager in the .NET application to convert PPT to PPTX
2. Add a reference to the GroupDocs.Conversion namespace for developing the PPT to PPTX conversion functionality
3. Create an instance of the Converter class for loading the input PPT file from the disk
4. Create and set convert options for the PPTX format
5. Finally, call the Convert method to save PPT to PPTX on the disk

We have outlined all the key steps to programmatically change PPT to PPTX in C#. These stepwise instructions need to be used in a sequence for creating the document conversion application. Further, it only requires you to write a few lines of code that contains the simple API calls for completing the capability. Additionally, these points are platform-independent and can be easily used on any of the common operating systems including Windows, Linux, and macOS that support a .NET environment.

Code to Convert PPT to PPTX using C#

We have developed the above sample capability to convert PPT to PPTX in C# using the workflow explained in the earlier section. The sample code is self-explanatory and can be easily used in your projects for performing document transformation. The document conversion is initialized by setting up the required package and then importing the essential namespaces. After that, we loaded the input PPT file using the Converter class constructor and then define convert options for the converted document. In the last step, we invoked the Convert method for saving the converted file to the disk.

We have discussed the document conversion process to export PPT to PPTX using C# and developed an example for it. Recently, we published an article to change Outlook Email to HTML using C#, have a look at how to convert Outlook Email to HTML in C# guide for more information.