For 2D maps, IsGridLatticeOn is always true. If an addin sets IsGridLatticeOn to false and attempts to apply the setting via GridOptionsEnvironment.SetGridOptions IsGridLatticeOn will be set back to true if the map is a 2d map. 3d local scenes, however, can toggle IsGridLatticeOn on/off in conjunction with Grid fill
Requirements
Target Platforms: Windows 11 Home, Pro, Enterprise (64 bit)