我使用Unity2018.3导出WebGL游戏时发生错误：
UnityEditor.BuildPlayerWindow+BuildMethodException: 3 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x00234] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:190
at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:96
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
我试了一下别人提供的解决方法：
1.项目路径中一定不要有中文
2.发布目录最好和项目在同一级目录下
照做，然而还是报错。
ArgumentException: The Assembly System.Configuration is referenced by System.Data ('Assets/Plugins/System.Data.dll'). But the dll is not allowed to be included or could not be found.
在项目中我用了一个Dll，System.Data.dll文件，很明显报错跟这个有关
我看了一下Dll文件在Inspector中没有WebGL的Platform settings
现在要么删除Data.dll 并将引用这个库的代码修改，但是这想想就太可怕了。
所以我要看清楚这句话
Dll is not allowed to be included or could not be found
网上有个网友解答了这个问题
其实设置了Api Compatibility Level为.Net 2.0就行了！
最后学习一下WebGL的开发注意事项