c# check if string is only letters and numbers
if (textVar.All(c => Char.IsLetterOrDigit(c))) {
// String contains only letters & numbers
}
c# check if string is only letters and numbers
if (textVar.All(c => Char.IsLetterOrDigit(c))) {
// String contains only letters & numbers
}
c# check if char is string
if (abc.ToLower().IndexOf('s') != -1) { }
c# check characters in string
errorCounter = Regex.Matches(yourstring,@"[a-zA-Z]").Count;
how to check if a string contains a capital letter c#
using System.Linq;
str.Any(char.IsUpper);
c# check characters in string
//true if it doesn't contain letters
bool result = hello.Any(x => !char.IsLetter(x));
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