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The .NET Framework 4.8 is not supported on this operating system.

Download Full Microsoft .NET Framework 4.8.1

You can download Microsoft .NET Framework 4.8.1 for free from our software library. This is Microsoft's comprehensive and consistent programming model for building applications with visually stunning user experiences, seamless and secure communication, and the ability to model a range of business processes. The .NET Framework redistributable package installs the .NET Framework runtime and associated files required to run applications developed to target the .NET Framework. Microsoft .NET Framework 4.8.1 is a highly compatible, in-place update to Microsoft .NET Framework 4, .NET Framework 4.5, .NET Framework 4.5.1, .NET Framework 4.5.2, and .NET Framework 4.6. The offline package can be used in situations where the web installer cannot be used due to lack of internet connectivity.

Features of Microsoft .NET Framework Final

Core Library Changes
Several new APIs have been added to enable key scenarios, especially cross-platform scenarios. These include the following changes and additions:

New cryptography APIs like AsymmetricAlgorithm.KeyExchangeAlgorithm and AsymmetricAlgorithm.SignatureAlgorithm, and System.Security.Cryptography.X509Certificates.X509Certificate
Additional collections implement System.Collections.ObjectModel.ReadOnlyCollection, including System.Collections.Generic.Queue and System.Collections.Generic.Stack.
Additional members to support the task-based asynchronous pattern (TAP), including Task.CompletedTask and NamedPipeClientStream.ConnectAsync.
Code Page Encoding Support
.NET Core primarily supports Unicode encoding and provides limited default support for code page encodings. You can add support for code page encodings available in .NET Framework but not supported in .NET Core by registering code page encodings using the Encoding.RegisterProvider method. For more information, see CodePagesEncodingProvider.

Event Tracing Enhancements
An EventSource object can now be created directly, and you can call one of the Write() methods to issue a self-describing event.

Resizing in Windows Forms Controls
This feature has been expanded to include System.Windows.Forms.DomainUpDown, System.Windows.Forms.NumericUpDown, System.Windows.Forms.DataGridViewComboBoxColumn, System.Windows.Forms.DataGridViewColumn, and System.Windows.Forms.ToolStripButton types.
This is an opt-in feature. To enable it, set the EnableWindowsFormsHighDpiAutoResizing element to true in the application configuration file (app.config).

64-bit JIT Compiler for Managed Code
This release includes a new version of the 64-bit JIT compiler, which provides significant performance improvements over the older 64-bit compiler. While we've tried to make the transition to the new compiler as seamless as possible, you may notice some changes in behavior.

Support for converting DateTime to or from Unix time
New methods have been added to support converting DateTime to or from Unix time. The following APIs have been added to DateTimeOffset:

Static DateTimeOffset FromUnixTimeSeconds(long seconds)
Static DateTimeOffset FromUnixTimeMilliseconds(long milliseconds)
long ToUnixTimeSeconds()
long ToUnixTimeMilliseconds()
ASP.NET Model Binding supports task-returning methods
Previously, ASP.NET model binding methods that returned tasks were not supported and would throw an exception at runtime if configured. If applications were deployed with these methods, they will now execute correctly. This change applies only to applications specifically targeting Microsoft .NET Framework 4.6 or later.

Microsoft .NET Framework 4.8.1 is installed on the following Windows and Windows Server versions:

Windows 10 April 2018 Update
Windows 10 Fall Creators Update
Windows 10 Creators Update
Windows 10 Anniversary Update
Windows Server, version 1709
Windows Server 2016