求一正则
分割 数字和字母

例如 123adc  分割后成123 abc
     123.123abc ---->123.123  abc 
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            string str = "123.123adc";

            foreach (Match match in Regex.Matches(str, @"[0-9]+(\.[0-9]+)?
------解决方案--------------------
[a-zA-Z]+"))

                Console.WriteLine(match.Value);

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string[] result=Regex.Split(str,@"(?<=\d)(?=[a-zA-Z])"); 
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update:

string[] result=Regex.Split(str,@"(?<=\d)(?=[a-zA-Z])
------解决方案--------------------
(?<=[a-zA-Z])(?=\d)");


------解决方案--------------------

List<string> list = new List<string>() { 

                    "123abc",

                    "123.123abc"

                };

                list = list.Select(a => {

                    Match m =  Regex.Match(a,@"(?i)(\d+?(\.\d+)?)([a-z]+)");

                    return m.Groups[1].Value + " " + m.Groups[3].Value;

                }).ToList();

------解决方案--------------------