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string text = "Example";
char firstCharacter = text[0];
Console.WriteLine(firstCharacter);
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string str = "ararara";
string str1 = str.Substring(0,1); // returns string so [a\0]
char str2 = str[0]; // This uses the String.Chars indexer, returns 'a'
char str3 = str.First(); // returns first character 'a' same as [0]
Console.WriteLine("str.Substring(0,1) {0}\nstr[0] {1}\nstr.FirstOrDefault() {2}", str1,str2,str3);
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var input = "12985bwevgjb9812";
string firstDigit = new String(input.TakeWhile(Char.IsDigit).ToArray());