.net Framework3.5，安装c#.net的软件需要用到.net Framework3.5，安装c#.net的软件需要用到

安装sqlserver2008出现 .net framework3.5 错误 NET Framework 3.5包含许多与 .NET Framework 2.0 和 .NET Framework 3.0 都可兼容的新功能。.NET Framework 3.5 包括若干针对 .NET Framework 2.0 和 .NET Framework 3.0 的修补程序.NET

.NET Framework 4.6.1，安装c#.net的软件需要用到.NET Framework 4.6.1，安装c#.net的软件需要用到

Microsoft .NET Framework 4.5 简体中文版 The .NET Framework 4.5 is a highly compatible, in-place update to the .NET Framework 4. By using the .NET Framework 4.5 together with the C#, Visual Basic, or F# programming language, you can write Windows apps. The .NET Framework 4.5 includes significant language and framework enhancements for C#, Visual Basic, and F# (so that you can more easily write asynchronous code), the blending of control flow in synchronous code, a responsive UI, and web app scalability . The .NET Framework 4.5 adds substantial improvements to other functional areas such as ASP.NET, Managed Extensibility Framework, Windows Communication Foundation, Windows Workflow Foundation, and Windows Identity Foundation. The .NET Framework 4.5 delivers better performance, reliability, and security.

可以用来卸载。net framework 高版本，解决.NET Framework 高版本不能卸载，低版本又不能安装的问题。