This release has reached end of life, meaning it is no longer supported. We recommend moving to a supported release, such as .NET Framework 4.8. See our support policy for more details.
Do you want to run apps? The runtime includes everything you need to run existing apps/programs built with .NET Framework.
Download .NET Framework 4.5.1 Runtime
Do you want to build apps? The developer pack is used by software developers to create applications that run on .NET Framework, typically using Visual Studio.
| Download type | Build apps - Dev Pack | Run apps - Runtime |
|---|---|---|
| Web installer | N/A | Runtime |
| Offline installer | Developer pack | Runtime |
| Language packs | N/A |
|
