Docs: Dev Tunnels "Configure dev tunnel options" examples do not compile; options table omits Region

Start with src/frontend/src/content/docs/integrations/devtools/dev-tunnels.mdx and compare its examples with DevTunnelOptions.cs and DevTunnelResourceBuilderExtensions.cs. Update the C# and TypeScript examples to match their documented signatures, and add Region to the options table with its C#-only scope. Done means the examples match the 13.5 APIs and the table covers the available options.

Page

integrations/devtools/dev-tunnels → "Configure dev tunnel options" and "Configuration → Dev tunnel options".

Source: dev-tunnels.mdx

Problem 1 — C# example does not compile

var options = new DevTunnelOptions
{
    TunnelId = "my-tunnel-id",              // not a DevTunnelOptions member
    Description = "QA environment tunnel",
    Labels = new[] { "qa", "testing" },     // string[] not assignable to List<string>?
    AllowAnonymous = false
};

var tunnel = builder.AddDevTunnel("qa", options)   // options bound to `string? tunnelId`
                    .WithReference(web);

Verified against DevTunnelOptions.cs — the members are Description, AllowAnonymous, Labels (List<string>?), and Region; there is no TunnelId — and DevTunnelResourceBuilderExtensions.cs — AddDevTunnel(string name, string? tunnelId = null, DevTunnelOptions? options = null).

Three issues:

1. TunnelId is not a member of DevTunnelOptions. It is a parameter of AddDevTunnel (and a property of DevTunnelResource).
2. Labels = new[] { "qa", "testing" } assigns a string[] to a List<string>? property, which does not compile.
3. builder.AddDevTunnel("qa", options) passes a DevTunnelOptions into the string? tunnelId positional parameter.

Correct:

var options = new DevTunnelOptions
{
    Description = "QA environment tunnel",
    Labels = ["qa", "testing"],
    AllowAnonymous = false
};

var tunnel = builder.AddDevTunnel("qa", tunnelId: "my-tunnel-id", options: options)
                    .WithReference(web);

Problem 2 — TypeScript example passes an options object the export does not accept

The exported polyglot API is addDevTunnel(name, tunnelId?, allowAnonymous?, description?, labels?) — from AddDevTunnelForPolyglot, annotated [AspireExport("addDevTunnel")] in DevTunnelResourceBuilderExtensions.cs. It takes positional parameters, not a { tunnelId, description, labels, allowAnonymous } object. The documented TypeScript call:

const tunnel = await builder.addDevTunnel("qa", {
    tunnelId: "my-tunnel-id",
    description: "QA environment tunnel",
    labels: ["qa", "testing"],
    allowAnonymous: false,
}).withReference(web);

does not match the exported signature (and tunnelId is not a nested option in either language).

Problem 3 — options table omits Region

The "Dev tunnel options" table lists only Description, Labels, and AllowAnonymous, but DevTunnelOptions also exposes Region (DevTunnelRegion?, an enum of ~13 regions). Note that the exported TypeScript addDevTunnel does not surface Region, so if the table documents Region, it should note the C#-only scope.

Provenance

aspire.dev release/13.5 (dev-tunnels.mdx); aspire release/13.5 (DevTunnelOptions.cs, DevTunnelResourceBuilderExtensions.cs). Compile behavior confirmed against the 13.5 candidate.