Http3ProtocolException.cs

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using System.Runtime.Serialization;
using System.Runtime.Versioning;
 
namespace System.Net.Http;
 
[Serializable]
[SupportedOSPlatform("windows")]
[SupportedOSPlatform("linux")]
[SupportedOSPlatform("macos")]
internal class Http3ProtocolException : Exception
{
    public Http3ErrorCode ErrorCode { get; }
 
    protected Http3ProtocolException(string message, Http3ErrorCode errorCode)
        : base(message)
    {
        ErrorCode = errorCode;
    }
 
    protected Http3ProtocolException(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {
        ErrorCode = (Http3ErrorCode)info.GetUInt32("ErrorCode");
    }
 
    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("ErrorCode", (uint)ErrorCode);
        base.GetObjectData(info, context);
    }
 
    protected static string GetName(Http3ErrorCode errorCode)
    {
        Http3ErrorCode num = errorCode - 256;
        if ((ulong)num <= 16uL)
        {
            switch (num)
            {
            case (Http3ErrorCode)0L:
                return "H3_NO_ERROR (0x100)";
            case (Http3ErrorCode)1L:
                return "H3_GENERAL_PROTOCOL_ERROR (0x101)";
            case (Http3ErrorCode)2L:
                return "H3_INTERNAL_ERROR (0x102)";
            case (Http3ErrorCode)3L:
                return "H3_STREAM_CREATION_ERROR (0x103)";
            case (Http3ErrorCode)4L:
                return "H3_CLOSED_CRITICAL_STREAM (0x104)";
            case (Http3ErrorCode)5L:
                return "H3_FRAME_UNEXPECTED (0x105)";
            case (Http3ErrorCode)6L:
                return "H3_FRAME_ERROR (0x106)";
            case (Http3ErrorCode)7L:
                return "H3_EXCESSIVE_LOAD (0x107)";
            case (Http3ErrorCode)8L:
                return "H3_ID_ERROR (0x108)";
            case (Http3ErrorCode)9L:
                return "H3_SETTINGS_ERROR (0x109)";
            case (Http3ErrorCode)10L:
                return "H3_MISSING_SETTINGS (0x10A)";
            case (Http3ErrorCode)11L:
                return "H3_REQUEST_REJECTED (0x10B)";
            case (Http3ErrorCode)12L:
                return "H3_REQUEST_CANCELLED (0x10C)";
            case (Http3ErrorCode)13L:
                return "H3_REQUEST_INCOMPLETE (0x10D)";
            case (Http3ErrorCode)15L:
                return "H3_CONNECT_ERROR (0x10F)";
            case (Http3ErrorCode)16L:
                return "H3_VERSION_FALLBACK (0x110)";
            }
        }
        return "(unknown error)";
    }
}