RotationConstraint.rotationAxis

Description

The axes affected by the RotationConstraint.

Use this property to restrict the effect of the constraint on a particular axis.

using UnityEngine.Animations;

public class ConstraintAxis
{
    public void ConstrainOnlyOnXY(RotationConstraint component)
    {
        component.rotationAxis = Axis.X | Axis.Y;
    }
}