Visual studio debugging for MVC only hit breakpoints once - Symbols not loaded
<p>I am working on ASP.NET Core 1.1 application and have big issue with debugging. it was working fine until recently only work when I create new project and it hit breakpoints in controller class but once application close and re-open it doesn't hit debugging point, although it still hit debugging point for startup.cs.</p>

<p>I believe it is complaining that symbols not been loaded as to test, I have created MVC 5 application and during debugging, the debugging red mark goes yellow, giving me symbols not loaded error message.</p>

<p>I am using Visual Studio 2015 update 3</p>

<p>Really need help here if someone know the answer </p>

<p>Thanks</p>