我应该为web使用静态DbUtil类吗,这有危险吗?

(我的申请在asp.net(mvc)

public static class DbUtil
{  
      public static int Insert(object o, string cs)
        {
            using (var conn = new SqlConnection(cs))
            using (var cmd = conn.CreateCommand())
            {
              ...

                conn.Open();
                return Convert.ToInt32(cmd.ExecuteScalar());
            }
        }
}

用法:

public class Repository<T> : IRepository<T>
{
       public virtual int Insert(T o)
       {
            return DbUtil.Insert(o, Cs);
       }
}

在服务或控制器中注入构造函数之后

    public MyController(
        IRepository<Organization> organizationRepository)
    {
        this.organizationRepository = organizationRepository;
    }