InvalidProgramException: Invalid IL code ???

This worked until two hours ago.
I added stuff to the foreach and it worked and at some point I received this error.
So I started deleting and still get the error with this simple code below.
I reinstalled. Reset the project. Changed file names, update orders and more.
At a lost.
Bug??
InvalidProgramException: Invalid IL code in WinnerSystems:OnUpdate (): IL_008d: brfalse IL_00a1

Code (CSharp):

1.   protected override void OnUpdate()
2.     {
3.         int goal = 1;
4.  
5.         Entities.ForEach
6.         (
7.             (Entity e
8.             ) =>
9.             {
10.  
11.                 goal = 2;
12.  
13.             }
14.         ).Run();
15.  
16.  

 

ever figure it out - ive heard change the foreach to a for loop