For me, the solution (workaround) is to turn off JavaScript debugging on Chrome, which I believe is a new feature introduced in VS 2017.
Go to Tools > Options > Debugging > General and turn off the setting for Enable JavaScript Debugging for ASP.NET (Chrome and IE).
Visual Studio 2017 error: Unable to start program, An operation is not legal in the current state
原文：https://www.cnblogs.com/itjeff/p/9116229.html