String - IsLetter
Indicates whether the character at the specified position in a specified string is categorized as a Unicode letter.
public static void Main() { string input = ".NET 4.7.2"; Console.WriteLine("Is each of the following characters a letter?"); for (int i = 0; i < input.Length; i++) { // C# Extension Method: String - IsLetter var result = input.IsLetter(i); Console.WriteLine("input[{0}] = {1} ", i, result); } }
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using System; public static partial class Extensions { /// <summary> /// Indicates whether the character at the specified position in a specified string is categorized as a Unicode /// letter. /// </summary> /// <param name="s">A string.</param> /// <param name="index">The position of the character to evaluate in .</param> /// <returns>true if the character at position in is a letter; otherwise, false.</returns> public static Boolean IsLetter(this String s, Int32 index) { return Char.IsLetter(s, index); } }