Comparing two different objects returns True

I have an A-Star script that used to work fine, but all of sudden has started doing something weird.

One of the first checks the script does is to make sure that the current cell we're on and the cell we want to get to aren't the same cell. If they are it means we've successfully calculated a path.

However, when I step over the code in Visual Studio, the comparison operator in the code below returns True, even though they have different values.



Any idea what might be causing this to happen?

The only thing I changed on this script was that I made the class Static, but this wouldn't be the issue would it?

 

How is the == operator implemented for this type? It might not check if those values are equal.

 

You're right. I have no idea why, but it changed from comparing values to comparing type instead. I had to override Equals and ==, but also needed to use a 'currentNode is null' check rather than 'currentNode == null' in a few places.

So things are working now, but its odd that == suddenly just changed what it was comparing.

 

It's a bit confusing, but when you use the "==" operator from within an == override method, you usually want to use https://docs.microsoft.com/en-us/dotnet/api/system.object.referenceequals?view=netframework-4.8 instead, otherwise you may be recursively calling your own == override instead of comparing object IDs.