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Ultimate ZIP Component for Xamarin Android, iOS and .NET Compact Framework

A high-performance, reliable, and feature-rich compression library for .NET Framework

A high-performance, reliable library which lets you add zip/unzip functionality to your Android, iOS, and .NET Compact Framework applications with a few lines of code.

If you need Ultimate Zip for .NET and Mono platforms, visit Ultimate ZIP Library for .NET for more details.

Ultimate ZIP for Mobile is also included in


Creating and modifying ZIP files easily

The component offers a comprehensive set of classes for compressing and decompressing archive files, providing the developer with everything that he needs to incorporate compression and decompression functionality in an application as listed below:

  • WinZip, PKZIP, and UNIX gZip compatible
  • Classic Pkzip encryption or AES encryption
  • 128-bit, 192-bit, and 256-bit AES encryption standard
  • Supports for the Zip64 file format
  • Supports BZip2 compression algorithm
  • Nine (9) compression levels, individual compression level can be set for each file
  • Create new and update an existing archive file in stream (can be on disk or in memory stream, buffer)
  • Extract files to disk, memory stream or memory buffer
  • Supports Wildcard for batch operations
  • Add, move, remove, rename and change attributes of files and folders in a zip file, on disk or in memory
  • Update files in an archive, on disk or in memory
  • List contents of zip file with complete file specifications (compression level, file attributes, zipped size, original size, compression rate and CRC)
  • Set individual password for each file
  • Supports Long file names
  • Supports Unicode file names
  • High-performance compression engine
  • Ability to test files in an archive
  • Control the path information stored in an archive for each file or folder
  • Recursively add or extract entire directories and their contents

.NET Technology

By using 100% managed code written in C#, the Ultimate ZIP component takes advantage of the numerous built-in features of the .NET Framework to enhance performance, moreover, the component is CLS compliant, and it does not use any unsafe blocks for minimal permission requirements. In addition, the component is highly compatible with Microsoft ClickOnce.


Supports many .NET Platforms

Ultimate ZIP Component for .NET supports the following platforms:
  • Windows Forms
  • Web Forms
  • Web Services
  • WPF

In addition, it is also possible to use the component in PowerShell - Microsoft’s new command console and scripting language.

It is fully compatible with Visual Studio 2005 to 2013 (.NET 2.0 to .NET 4.5.1). As a benefit, you are always up-to-date with Microsoft's Technologies when using our products.


Supports event-driven (Asynchronous) and blocking (Synchronous) Design

Most applications written with the component will be synchronous. Synchronous method gives you the ease-of-use, but it can only returns the control back to the caller after it has finished, meaning that it blocks the execution of the caller for a period of time. Using synchronous method is recommended when you only need to execute one operation at a time.

You might decide that your design requires an asynchronous operation when it is needed to manage email messages simultaneously. Asynchronous methods provide a great deal of power. Asynchronous method is executed on a thread separate from the calling thread. Such operation is useful when an ZIP operation is time consuming and other codes need to execute without waiting for the initial operation to complete. In addition, the user interface will be most responsive when asynchronous methods are used.



The ZIP component has been designed with a great degree of flexibility and can be used with a wide variety of programming languages and different types of development environments. Available as a managed .NET class, it is fully supported by languages such as Visual Basic, Visual C#, J#, Managed C++, Borland C# Builder, and Delphi.


Fully Documented

As important as functionality, features and stability are, comprehensive documentation is equally as important to the application developer. This is why the ComponentPro ZIP for .NET product includes a Developer's Guide and a complete Technical Reference which documents every property, method and event supported by the component. A printable version of the documentation is included with the product, as well as context-sensitive online help which can be accessed directly from within the development environment.


Complete compression and decompression examples in C#, VB.NET, and ASP.NET

In addition to the fully documented Developer's Guide and a complete Technical Reference, the library also includes a number of samples with full source code which help you become familiar with the features of the component and provide code which you can re-use in your own applications. The setup package contains one complete ZIP manager application.



ComponentPro understands today's software development requirements which often require support for multiple operating systems and different programming languages. As with all ComponentPro components, the product is licensed to a single developer, and applications built using the library can be redistributed to as many end-users as needed without additional royalties or runtime licensing fees. Developers are also permitted to install the product on different development systems as long as they are the only one using it and there is no chance that it can be used by more than one developer at the same time.



Our developers have been using the Ultimate Suite for over 6 mons now on an intranet web application. We were very impressed by the feature-set, the ease of use and the great online tutorials and code examples. I will recommend ComponentPro to my colleages.
Mark Deaney - CTO PowerCT
Our developers have been using the Ultimate Suite for over 6 mons now on an intranet web application. We were very impressed by the feature-set, the ease of use and the great online tutorials and code examples. I will recommend ComponentPro to my colleages.
Mark Deaney - CTO PowerCT