how do I surpass this error? I don't understand what I'm doing wrong. Also tried simply Find(go) but nope to that also. error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer

also_tried_casting_autocompleted_suggestion_but_same_error.cs

  public void RemoveUserGO(GameObject go){
	  int i = UserCreatedGOs.FindIndex( (GameObject obj) => obj.GetInstanceID = go.GetInstanceID );
	  UserCreatedGOs.RemoveAt(i);
	  //...do more with i
  }

I_cannot_predicates_how_do_I_predicates.cs

  public void RemoveUserGO(GameObject go){
	  int i = UserCreatedGOs.FindIndex( obj => obj.GetInstanceID = go.GetInstanceID );
	  UserCreatedGOs.RemoveAt(i);
	  //...do more with i
  }

1. Use == instead, i.e. Blah => herp == derp
2. Get this: error CS0019: Operator ==' cannot be applied to operands of typemethod group' and `method group'
3. Notice that GetInstanceID is a method
4. Use () instead: Blah => herp() == derp()

Incidentally here's the definition of method group... http://stackoverflow.com/questions/886822/what-is-a-method-group-in-c
Solved.