主要报错：

Stack overflow.
Repeat 13770 times:
--------------------------------
   at Simple.Repository.DataFilter..ctor()
--------------------------------
   at Simple.Repository.SimpleDbContext..ctor(Microsoft.EntityFrameworkCore.DbContextOptions`1<Simple.Repository.SimpleDbContext>, Simple.Common.Services.ICurrentUserService)

相关代码：

// SimpleDbContext
public class SimpleDbContext : DbContext
{
    public virtual DataFilter DataFilter { get; set; } = new DataFilter();
}

public class DataFilter
{
    private static DataFilter _default;

    public bool IgnoreSoftDelete { get; set; }

    static DataFilter()
    {
        // 这种方式赋值，在构造函数中无法获取到值
        //_default = new DataFilter()
        //{
        //    IgnoreSoftDelete = false
        //};
    }

    public DataFilter()
    {
        // 这种写法直接 Stack Overflow 了
        if(_default == null)
        {
            _default = new DataFilter()
            {
                IgnoreSoftDelete = false
            };
        }

        IgnoreSoftDelete = _default.IgnoreSoftDelete;
    }
}

遇到一个莫名其妙的问题，先发上来，看看有没大佬能解疑一下。
个人同步去找答案，找到再回来跟帖_{_}