Char - ToLower

Converts the value of a Unicode character to its lowercase equivalent.

Try it

public static void Main()
{
    char [] input = {'.','N','E','T','4','.','7','.','2'};
	
	Console.WriteLine("Converted all the characters to lower case.");

    for (int i = 0; i < input.Length; i++)
    {
		// C# Extension Method: Char - ToLower
		var result = input[i].ToLower();
		
        Console.WriteLine("{0} : {1} ", input[i], result);
    }
}

View Source
using System;
using System.Globalization;

public static partial class Extensions
{
    /// <summary>
    ///     Converts the value of a specified Unicode character to its lowercase equivalent using specified culture-
    ///     specific formatting information.
    /// </summary>
    /// <param name="c">The Unicode character to convert.</param>
    /// <param name="culture">An object that supplies culture-specific casing rules.</param>
    /// <returns>
    ///     The lowercase equivalent of , modified according to , or the unchanged value of , if  is already lowercase or
    ///     not alphabetic.
    /// </returns>
    public static Char ToLower(this Char c, CultureInfo culture)
    {
        return Char.ToLower(c, culture);
    }

    /// <summary>
    ///     Converts the value of a Unicode character to its lowercase equivalent.
    /// </summary>
    /// <param name="c">The Unicode character to convert.</param>
    /// <returns>
    ///     The lowercase equivalent of , or the unchanged value of , if  is already lowercase or not alphabetic.
    /// </returns>
    public static Char ToLower(this Char c)
    {
        return Char.ToLower(c);
    }
}