ip范围生成

--测试  ，，大家还有什么更好的方法

List<string> list = new List<string>();
// new ConsoleApplicationTest.Test1.class33().NewMethod(list,"192.168.1.2","192.168.1.23"); 后1 !=
// new ConsoleApplicationTest.Test1.class33().NewMethod(list, "192.168.1.2", "192.168.3.23");后2 !=
// new ConsoleApplicationTest.Test1.class33().NewMethod(list, "192.138.1.2", "192.168.3.23"); //后3 !=
// new ConsoleApplicationTest.Test1.class33().NewMethod(list, "122.168.1.2", "192.168.3.23");//后4 !=

// new ConsoleApplicationTest.Test1.class33().NewMethod(list, "122.168.1.2", "124.168.1.2");

// new ConsoleApplicationTest.Test1.class33().NewMethod(list, "124.158.1.2", "124.168.1.2");

 public class class33
    {
        public List<string> NewMethod(List<string> list, string p1, string p2)
        {
            string start = p1;// item.Attributes["start"].Value;
            string end = p2;// item.Attributes["end"].Value;
            string[] sp1 = start.Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
            string[] sp2 = end.Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);

            if (sp1[0] == sp2[0])
            {
                if (sp1[1] == sp2[1])
                {
                    if (sp1[2] == sp2[2])
                    {
                        if (sp1[3] == sp2[3])
                        {
                            if (!list.Contains(start))
                            {
                                list.Add(start);
                            }
                           
                        }
                        else
                        {
                            #region 3 !=
                          
                            int _start = Convert.ToInt16(sp1[3]);
                            int _end = Convert.ToInt16(sp2[3]);
                            for (int j = _start; j <= _end; j++)
                            {
                                if (!list.Contains(sp1[0] + "." + sp1[1] + "." + sp1[2] + "." + j.ToString()))
                                {
                                    list.Add(sp1[0] + "." + sp1[1] + "." + sp1[2] + "." + j.ToString());
                                }
                              

                            }
                            #endregion
                        }//3


                    }
                    else
                    {
                        #region 2 !=
                        int _start = 0;
                        int _end = 0;
                        _start = Convert.ToInt16(sp1[2]);
                        _end = Convert.ToInt16(sp2[2]);
                        for (int j = _start; j <= _end; j++)
                        {
                            if (!list.Contains(sp1[0] + "." + sp1[1] + "." + j.ToString() + "." + sp1[3]))
                            {
                                  list.Add(sp1[0] + "." + sp1[1] + "." + j.ToString() + "." + sp1[3]);
                            }
                          
                            string t1 = sp1[0] + "." + sp1[1] + "." + j.ToString() + "." + sp1[3];
                            string t2 = sp2[0] + "." + sp2[1] + "." + j.ToString() + "." + sp2[3];
                            if (t1 != t2)
                            {
                                NewMethod(list, t1, t2);
                            }
                        }
                        #endregion


                    }//2
                }
                else
                {
                    #region 1 !=

                    int _start = 0;
                    int _end = 0;
                    _start = Convert.ToInt16(sp1[1]);
                    _end = Convert.ToInt16(sp2[1]);
                    for (int j = _start; j <= _end; j++)
                    {
                        if (!list.Contains(sp1[0] + "." + j.ToString() + "." + sp1[2] + "." + sp1[3]))
                        {
                            list.Add(sp1[0] + "." + j.ToString() + "." + sp1[2] + "." + sp1[3]);
                        }
                        string t1 = sp1[0] + "." + j.ToString() + "." + sp1[2] + "." + sp1[3];
                        string t2 = sp2[0] + "." + j.ToString() + "." + sp2[2] + "." + sp2[3];
                        if (t1 != t2)
                        {
                            list = NewMethod(list, t1, t2);
                        }
                    }

                    #endregion

                }//1
            }
            else
            {
                #region 0!=
                int _start = 0;
                int _end = 0;
                _start = Convert.ToInt16(sp1[0]);
                _end = Convert.ToInt16(sp2[0]);
                for (int j = _start; j <= _end; j++)
                {
                    if (!list.Contains(j.ToString() + "." + sp1[1] + "." + sp1[2] + "." + sp1[3]))
                    {
                          list.Add(j.ToString() + "." + sp1[1] + "." + sp1[2] + "." + sp1[3]);
                    }
                  
                    string t1 = j.ToString() + "." + sp1[1] + "." + sp1[2] + "." + sp1[3];
                    string t2 = j.ToString() + "." + sp2[1] + "." + sp2[2] + "." + sp2[3];
                    if (t1 != t2)
                    {
                        list = NewMethod(list, t1, t2);
                    }
                }
                #endregion

            }//0


            return list;
        }
    }