TitleModifier.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using UnityEditor;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace ToolKits
{
    public class TitleModifier
    {
        private const int Delay = 2000;
        
        [InitializeOnLoadMethod]
        private static void Init()
        {
            ModifyTitleAsync();
        }

        private static async void ModifyTitleAsync()
        {
            await Task.Delay(Delay);
            ModifyTitle();
        }
        
        private static void ModifyTitle()
        {
            Type tEditorApplication = typeof(EditorApplication);
            Type tApplicationTitleDescriptor = tEditorApplication.Assembly.GetTypes()
                .First(x => x.FullName == "UnityEditor.ApplicationTitleDescriptor");

            EventInfo eiUpdateMainWindowTitle =
                tEditorApplication.GetEvent("updateMainWindowTitle", BindingFlags.Static | BindingFlags.NonPublic);
            MethodInfo miUpdateMainWindowTitle =
                tEditorApplication.GetMethod("UpdateMainWindowTitle", BindingFlags.Static | BindingFlags.NonPublic);

            Type delegateType = typeof(Action<>).MakeGenericType(tApplicationTitleDescriptor);
            MethodInfo methodInfo = ((Action<object>) UpdateWindowTitle).Method;
            Delegate del = Delegate.CreateDelegate(delegateType, null, methodInfo);

            eiUpdateMainWindowTitle.GetAddMethod(true).Invoke(null, new object[] {del});
            miUpdateMainWindowTitle.Invoke(null, new object[0]);
            eiUpdateMainWindowTitle.GetRemoveMethod(true).Invoke(null, new object[] {del});
        }

        static void UpdateWindowTitle(object desc)
        {
            var fieldInfo = typeof(EditorApplication).Assembly.GetTypes()
                .First(x => x.FullName == "UnityEditor.ApplicationTitleDescriptor")
                .GetField("title", BindingFlags.Instance | BindingFlags.Public);
            var str = fieldInfo.GetValue(desc) as string;
            fieldInfo.SetValue(desc, str + "【分支】：release");
        }
        
    }
}