C#中在字符串中插入空格

[double祺永远被保佑]

请问大家有谁如何在C#中在字符串中插入空格？比如str="181936 "转化成str="18 19 36"

[lihuinihao6315]

按转化规律
sfd.Insert(0,'');

[dalmeeme]

		string s = "abcdefgh123456";
		string r = Regex.Replace(s, @"(?<=.{2}).{2}", " $0");
		Console.Write(r);

[dalmeeme]

简单的直接用:
string s = "abcd";
string r = s.Insert(2, " ");
Console.Write(r);

[double祺永远被保佑]

谢谢了！

[xggllc]

这个好用

[浪子-无悔]

很简洁的方法~~~~

[EnForGrass]

 string s = "181936";
 s = string.Join(" ", System.Text.RegularExpressions.Regex.Split(s, "(?<=\\G.{2})(?!$)"));