Measuring the length of string containing wide characters

As documented:

The Length property returns the number of Char objects in this instance, not the number of Unicode characters. The reason is that a Unicode character might be represented by more than one Char. Use the System.Globalization.StringInfo class to work with each Unicode character instead of each Char.

---

Getting length:

new System.Globalization.StringInfo("友𠂇又").LengthInTextElements

---

Getting each Unicode character is documented here, but it’s much more convenient to make an extension method:

public static IEnumerable<string> TextElements(this string s) {
    var en = System.Globalization.StringInfo.GetTextElementEnumerator(s);

    while (en.MoveNext())
    {
        yield return en.GetTextElement();
    }
}

and use it in a foreach or in a LINQ statement:

foreach (string segment in "友𠂇又".TextElements())
{
    Console.WriteLine(segment);
}

which also can be used for length:

Console.WriteLine("友𠂇又".TextElements().Count());