How to make a first letter capital in C#

Question

How can the first letter in a text be set to capital?

Example:

it is a text.  = It is a text.

Answer 1

this functions makes capital the first letter of all words in a string

public static string FormatSentence(string source)
    {
        var words = source.Split(' ').Select(t => t.ToCharArray()).ToList();
        words.ForEach(t =>
        {
            for (int i = 0; i < t.Length; i++)
            {
                t[i] = i.Equals(0) ? char.ToUpper(t[i]) : char.ToLower(t[i]);
            }
        });
        return string.Join(" ", words.Select(t => new string(t)));;
    }