Microsoft no longer provides a direct standalone download link for the .NET Framework 4.5 Developer Pack because that specific version reached its end of support on January 12, 2016.

1. Go to the Microsoft .NET Framework 4.5 Developer Pack download page: You can find the download page by searching for ".NET Framework 4.5 Developer Pack" on the Microsoft website.
2. Click on the download link: Once you are on the download page, click on the download link to start the download process.
3. Select the correct architecture: Make sure to select the correct architecture (x86 or x64) that matches your development environment.
4. Download the package: The package is approximately 2.5 GB in size, so it may take some time to download.

Important: Visual Studio Compatibility

Before you click "Install," check your Visual Studio version:

Are you attempting to open an existing legacy project in a newer version of Visual Studio, or are you setting up a new build server?

What Does the .NET Framework 4.5 Developer Pack Include?

| Component | Description | |-----------|-------------| | .NET Framework 4.5 Runtime | Allows you to run .NET 4.5 apps | | Reference Assemblies | Compile apps targeting .NET 4.5 without having the full framework installed on the build machine | | IntelliSense files | Provides documentation tooltips in Visual Studio | | MSBuild targets and tasks | Required for building with MSBuild | | Corresponding SDK tools | csc.exe, resgen.exe, tlbimp.exe, etc. for that version |

Download .NET Framework 4.5.2 Developer Pack: This is the recommended alternative for legacy 4.5 apps. It installs the multi-targeting pack for 4.5 and is available on the Microsoft Download Center.

.NET Framework 4.5.1 Developer Pack – Used specifically for legacy projects that must target the 4.5.1 revision.

What is the .NET Framework 4.5 Developer Pack?

Many developers confuse the Runtime with the Developer Pack. They are not the same thing.