Overlapping gridlines should be avoided, unless there are only two and one is host type dependent and the other is not.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)
Syntax
C#
public static FailureDefinitionId GridlinesOverlap { get; }