Unity & C# // How can I change the physical material of the capsule collider to true or false as a Bool value in C#?

I'm making a small game with Unity, but I'm having a small problem, can you help me?

How can I change the physical material of the capsule collider to true or false as a Bool value in C#?

I've created a physics material and applied it to my Player's Capsule Collider. In C#, I want to manually set true or false value through bool.

[SerializeField] PhysicMaterial materialToApply;
[SerializeField] CapsuleCollider colliderToAdjust;

void TogglePhysicsMaterial(bool Toggle)
{
    if (Toggle)
    {
        colliderToAdjust.material = materialToApply;
    }
    else
    {
        colliderToAdjust.material = null;
    }
}

As others have said, just set the material property to null when you don't want it, and assign it when you do. I saw you want to have it toggle on jump, so here is a quick and dirty way as an example:

void Update()
{
    if(colliderToAdjust.transform.position.y > 0
        && !colliderToAdjust.material)
    {
        TogglePhysicsMaterial(true);
    }
    else if(colliderToAdjust.transform.position.y <= 0
        && colliderToAdjust.material)
    {
        TogglePhysicsMaterial(false);
    }
}

There are plenty of (MUCH) better ways to handle jump detection (e.g. Raycasts) so please don't think this is a good method as it relies on the capsule being placed at 0 height and wouldn't work with an incline.