<PackageReference Include="System.Text.Encodings.Web" Version="4.6.0-preview9.19421.4" />

UnicodeDebug

static class UnicodeDebug
using System.Diagnostics; using System.Runtime.CompilerServices; namespace System.Text { internal static class UnicodeDebug { [Conditional("DEBUG")] internal static void AssertIsHighSurrogateCodePoint(uint codePoint) { } [Conditional("DEBUG")] internal static void AssertIsLowSurrogateCodePoint(uint codePoint) { } [Conditional("DEBUG")] internal static void AssertIsValidCodePoint(uint codePoint) { } [Conditional("DEBUG")] internal static void AssertIsValidScalar(uint scalarValue) { } [Conditional("DEBUG")] internal static void AssertIsValidSupplementaryPlaneScalar(uint scalarValue) { } private static string ToHexString(uint codePoint) { return FormattableString.Invariant(FormattableStringFactory.Create("U+{0:X4}", codePoint)); } } }