PascalCase:

The first letter of every word is capitalized.

camalCase:

The first letter of the variable is lowercase, while the preceding words have the first letter capitalized.

Private class variables must start with m_

Order:

[SerializeField]

Private variable

Public variable

Constant

Example:

[SerializeField] private CharacterController m_controller;
[SerializeField] private float m_speed = 11f;

private Vector3 m_verticalVelocity;
private bool m_isGrounded;

public bool canJump;

const float Gravity = -15