check if a string contains a number C# code example

Example 1: c# how to check string is number

string s1 = "123";
string s2 = "abc";

bool isNumber = int.TryParse(s1, out int n); // returns true
isNumber = int.TryParse(s2, out int n); // returns false

Example 2: if string contains number c#

"abc3def".Any(c => char.IsDigit(c));

// Or to make it shorter:
"abc3def".Any(char.IsDigit);