Self-Creating Singleton Method for Unity

private static INSTANCE_CLASS m_Instance;

/// <summary>
/// This callback is called after all Awake functions have been called by Unity.
/// This makes sure that everything is initialized (a big issue in the editor)
/// before creating an instance.
/// </summary>
[RuntimeInitializeOnLoadMethod]
private static void CreateObject() {
    if (m_Instance == null) {
        var go = new GameObject("NAME OF OBJECT");
        m_Instance = go.AddComponent<INSTANCE_CLASS>();
        go.hideFlags = HideFlags.HideInHierarchy | HideFlags.HideInInspector;
        DontDestroyOnLoad(go);
        m_Instance.Initialize();
    }
}

private void Initialize() {

}