<PackageReference Include="NETStandard.Library" Version="2.0.3" />

System.Globalization.StringInfo

public class StringInfo
namespace System.Globalization { public class StringInfo { public int LengthInTextElements { get; } public string String { get; set; } public StringInfo(); public StringInfo(string value); public static string GetNextTextElement(string str); public static string GetNextTextElement(string str, int index); public static TextElementEnumerator GetTextElementEnumerator(string str); public static TextElementEnumerator GetTextElementEnumerator(string str, int index); public static int[] ParseCombiningCharacters(string str); public string SubstringByTextElements(int startingTextElement); public string SubstringByTextElements(int startingTextElement, int lengthInTextElements); } }