CacheManager 类的 Instance 静态属性可能为 null

[a44281071]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

CacheManager类的Instance是从实例构造里初始化的。
这就会导致在某些情况下，直接访问CacheManager造成null异常。
这通常会在Utility静态类中的一些方法中重现异常，如初始化DataTableDynamicContext实例。

Expected Behavior

No response

Steps To Reproduce

No response

Exceptions (if any)

No response

.NET Version

net8.0

Anything else?

库版本：8.6.4为止有此类问题。

[bb-auto[bot]]

@a44281071 Thank you for filing this issue. In order for us to investigate this issue, please provide a minimalistic repro project that illustrates the problem.

[ArgoZhang]

@a44281071 请提供复现工程