DataColumn dc = new DataColumn("d", typeof(int));
            dc.DefaultValue = 0;
            DataColumn dc2 = new DataColumn("e", typeof(int));
            dc2.DefaultValue = 0;
            dt1.Columns.Add(dc2);

------解决方案--------------------
少了倒数第二行：
dt1.Columns.Add(dc);
探讨

C# code
            DataColumn dc = new DataColumn("d", typeof(int));
            dc.DefaultValue = 0;
            DataColumn dc2 = new DataColumn("e", typeof(int));
            dc2.DefaultValue =……


------解决方案--------------------
探讨


少了倒数第二行：
dt1.Columns.Add(dc);
引用:
C# code
DataColumn dc = new DataColumn("d", typeof(int));
dc.DefaultValue = 0;
DataColumn dc2 = new DataColumn("e", typeof(int));
dc2.DefaultValue =………