Microsoft
https://www.microsoft.com/en-hk/download/details.aspx?id=30653
By using the .NET Framework 4.5 together with the C#, Visual Basic, or F# programming language, you can write Windows apps.
4.5
Open Source
Not Applicable
.NET Framework 4.5 for Windows
https://dotnet.microsoft.com/platform/open-source
While approved for use, there is no ITS support for the application. Please contact the vendor directly for support.
Level 3