stripped down decompiled UnityEngine.Object to show operator== and Equals overloads

UnityEngine.Object-Decompiled.cs

namespace UnityEngine
{
    public class Object
    {
        //
        // Operators
        //
        public static bool operator ==(Object x, Object y) {
            return Object.CompareBaseObjects(x, y);
        }

        public static implicit operator bool(Object exists) {
            return !Object.CompareBaseObjects(exists, null);
        }

        public static bool operator !=(Object x, Object y) {
            return !Object.CompareBaseObjects(x, y);
        }

        //
        // Static Methods
        //
        private static void CheckNullArgument(object arg, string message)
        {
            if (arg == null) {
                throw new ArgumentException(message);
            }
        }

        private static bool CompareBaseObjects(Object lhs, Object rhs)
        {
            bool flag = lhs == null;
            bool flag2 = rhs == null;
            if (flag2 && flag) {
                return true;
            }
            if (flag2) {
                return !Object.IsNativeObjectAlive(lhs);
            }
            if (flag) {
                return !Object.IsNativeObjectAlive(rhs);
            }
            return lhs.m_InstanceID == rhs.m_InstanceID;
        }

        [WrapperlessIcall]
        [MethodImpl(MethodImplOptions.InternalCall)]
        internal static extern bool DoesObjectWithInstanceIDExist(int instanceID);

        private static bool IsNativeObjectAlive(Object o)
        {
            return o.GetCachedPtr() != IntPtr.Zero || (!(o is MonoBehaviour) && !(o is ScriptableObject) && Object.DoesObjectWithInstanceIDExist(o.GetInstanceID()));
        }

        //
        // Methods
        //
        public override bool Equals(object o)
        {
            return Object.CompareBaseObjects(this, o as Object);
        }

        private IntPtr GetCachedPtr()
        {
            return this.m_CachedPtr;
        }

        public override int GetHashCode()
        {
            return this.GetInstanceID();
        }

        public int GetInstanceID()
        {
            return this.m_InstanceID;
        }

        [WrapperlessIcall]
        [MethodImpl(MethodImplOptions.InternalCall)]
        public override extern string ToString();
    }
}