Visual Studio 2017(15.7.1)的最新更新现在为此提供了一个选项.在Tools->Options菜单下，选择TextEditor->C#->Code Style->General选项卡.在Field preferences下，有一个Prefer readonly选项.将其设置为No.

A recent update to Visual Studio 2017 (15.7.1) has an option for this now. Under the Tools->Options menu, select the TextEditor->C#->Code Style->General tab. Under Field preferences, there is a Prefer readonly option. Set that to No.

如果要在代码旁边检查此首选项，还可以设置editorconfig设置，因此使用代码的其他人不会收到警告，但是必须针对每个解决方案进行设置基础.您将设置的editorconfig值为:

There is also an editorconfig setting you can set if you want to check this preference in along side your code, so others who consume your code don't get the warning, but that has to be done on a per solution basis. The editorconfig value you would set would be:

 dotnet_style_readonly_field = false:none