using System.Runtime.CompilerServices; namespace System.Text.Unicode { public sealed class UnicodeRange { public int FirstCodePoint { get; } public int Length { get; } public UnicodeRange(int firstCodePoint, int length) { if (firstCodePoint < 0 || firstCodePoint > 65535) throw new ArgumentOutOfRangeException("firstCodePoint"); if (length < 0 || (long)firstCodePoint + (long)length > 65536) throw new ArgumentOutOfRangeException("length"); FirstCodePoint = firstCodePoint; Length = length; } [NullableContext(1)] public static UnicodeRange Create(char firstCharacter, char lastCharacter) { if (lastCharacter < firstCharacter) throw new ArgumentOutOfRangeException("lastCharacter"); return new UnicodeRange(firstCharacter, 1 + (lastCharacter - firstCharacter)); } } }