我需要验证字符串的第一个字符是否为字母，下一个字符是否为字母或数字或特殊字符 _、-、。 和空间

Question

Please note:All characters are in English only.

I tried Regex.IsMatch(item, @"^[a-zA-Z][a-zA-Z0-9_.-]+$") but doesn't work expectedly

Answer 1

Regex.IsMatch(item, @"^[a-zA-Z][a-zA-Z0-9_. -]*$")

There is a space between '.' and '-'

Thanks all for your suggestions. My sample inputs are: Vikash,Vikash kumar,Vikash. kumar,Vikash9_. kumar <-these should be supported

and

9Vikash,Vikash*hj,Vikash&9,%ghj <-these shouldn't be supported