String - IsLower

Indicates whether the character at the specified position in a specified string is categorized as a lowercase letter.

Try it

public static void Main()
{
    string input = "Entity Framework 6";

    Console.WriteLine("Is each of the following characters in a lower case?");

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

View Source
using System;

public static partial class Extensions
{
    /// <summary>
    ///     Indicates whether the character at the specified position in a specified string is categorized as a lowercase
    ///     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 lowercase letter; otherwise, false.</returns>
    public static Boolean IsLower(this String s, Int32 index)
    {
        return Char.IsLower(s, index);
    }
}