/C#/C# string capital first letter extension method

C# string capital first letter extension method

public static class StringExtensions
{
    public static string FirstCharToUpper(this string input) =>
        input switch
        {
            null => throw new ArgumentNullException(nameof(input)),
            "" => throw new ArgumentException($"{nameof(input)} cannot be empty", nameof(input)),
            _ => input.First().ToString().ToUpper() + input.Substring(1)
        };
}

Source: stackoverflow.com

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