C# 全角转半角

1.判断字符串中是否包含全角字符

bool isFull = rawStr.Any(c => c >= 0xFF00 && c <= 0xFFEF);

2.全角转半角

string newStr = Regex.Replace(rawStr, @"[\uFF01-\uFF5E]", m => ((char)(m.Value[0] - 0xFEE0)).ToString());