参考.Net 4.5和netstandard2.0项目的.Net 4.5项目拉错了版本但是可以工作

Question

I have a class library that I've ported from .Net 4.5 to a new multi-target class library targeting .Net 4.5 and netstandard2.0 . This all seems to work as expected.

However, my unit test library in the same solution is targeting .Net 4.5 . When I look at the project reference, it seems to be pulling in the netstandard2.0 binary. When I run the unit tests, everything compiles and works as expected, however, it was my understanding that I'd need to be targeting at least .Net 4.6.1 for the project to successfully use a netstandard2.0 reference.

What am I misunderstanding?

Answer 1

Quote from Microsoft Documentation Says

The various .NET implementations target specific versions of .NET Standard. Each .NET implementation version advertises the highest .NET Standard version it supports, a statement that means it also supports previous versions. For example, the .NET Framework 4.6 implements .NET Standard 1.3, which means that it exposes all APIs defined in .NET Standard versions 1.0 through 1.3. Similarly, the .NET Framework 4.6.1 implements .NET Standard 1.4, while .NET Core 1.0 implements .NET Standard 1.6.

Hope it helps

Reference