Consider adding `Uri.UriSchemeData`

[glen-84]

Is your feature request related to a problem? Please describe.

We have constants for http, https, etc., but not for data: URIs.

Describe the solution you'd like

A new constant in the System.Uri class:

namespace System
{
    public partial class Uri
    {
        public static readonly string UriSchemeHttp;
        public static readonly string UriSchemeHttps;
        // +14 other schemes following the same pattern

+       public static readonly string UriSchemeData = "data";
    }
}

Additional context

n/a

[glen-84]

Apologies, I always get confused between the runtime and sdk repositories – could someone please move this issue to dotnet/runtime?

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[MihaZupan]

Sounds like a reasonable thing to add, we opened the door to adding more constants here with .NET 6 #35180 (comment). data feels common enough to include.

For reference here's the current list

runtime/src/libraries/System.Private.Uri/src/System/Uri.cs

Lines 22 to 37 in ffb52e9

	public static readonly string UriSchemeFile = UriParser.FileUri.SchemeName;
	public static readonly string UriSchemeFtp = UriParser.FtpUri.SchemeName;
	public static readonly string UriSchemeSftp = "sftp";
	public static readonly string UriSchemeFtps = "ftps";
	public static readonly string UriSchemeGopher = UriParser.GopherUri.SchemeName;
	public static readonly string UriSchemeHttp = UriParser.HttpUri.SchemeName;
	public static readonly string UriSchemeHttps = UriParser.HttpsUri.SchemeName;
	public static readonly string UriSchemeWs = UriParser.WsUri.SchemeName;
	public static readonly string UriSchemeWss = UriParser.WssUri.SchemeName;
	public static readonly string UriSchemeMailto = UriParser.MailToUri.SchemeName;
	public static readonly string UriSchemeNews = UriParser.NewsUri.SchemeName;
	public static readonly string UriSchemeNntp = UriParser.NntpUri.SchemeName;
	public static readonly string UriSchemeSsh = "ssh";
	public static readonly string UriSchemeTelnet = UriParser.TelnetUri.SchemeName;
	public static readonly string UriSchemeNetTcp = UriParser.NetTcpUri.SchemeName;
	public static readonly string UriSchemeNetPipe = UriParser.NetPipeUri.SchemeName;