# TraconTenancyBuilderExtensions

> Tracon documentation. Tracon is a .NET package family that adds a control
> plane on Microsoft Agent Framework, published as NuGet packages that run
> inside your own ASP.NET Core application.
>
> Page: https://tracon.dev/api/tracon.tracontenancybuilderextensions/
> Summary: TraconTenancyBuilderExtensions: Extensions that connect multi-tenancy to the HTTP request.

<div class="api-provenance">Namespace Tracon · Assembly <code>Tracon.AspNetCore.dll</code></div>

Extensions that connect multi-tenancy to the HTTP request.

```csharp
public static class TraconTenancyBuilderExtensions
```

<dl class="api-relations"><dt>Inheritance</dt><dd><a href="https://learn.microsoft.com/dotnet/api/system.object">object</a> ← <a href="/api/tracon.tracontenancybuilderextensions/">TraconTenancyBuilderExtensions</a></dd><dt>Inherited Members</dt><dd><a href="https://learn.microsoft.com/dotnet/api/system.object.gettype">object.GetType()</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone">object.MemberwiseClone()</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.tostring">object.ToString()</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)">object.Equals(object?)</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)">object.Equals(object?, object?)</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.referenceequals">object.ReferenceEquals(object?, object?)</a>, <a href="https://learn.microsoft.com/dotnet/api/system.object.gethashcode">object.GetHashCode()</a></dd></dl>

## Methods

### <a id="Tracon_TraconTenancyBuilderExtensions_UseTenancy_Tracon_ITraconBuilder_System_Action_Tracon_TraconTenancyOptions__"></a> UseTenancy\(ITraconBuilder, Action<TraconTenancyOptions\>\)

Resolves the tenant from the current HTTP request. If not called, Tracon
runs single-tenant and no extra configuration is needed.

```csharp
public static ITraconBuilder UseTenancy(this ITraconBuilder builder, Action<TraconTenancyOptions> configure)
```

#### Parameters

`builder` [ITraconBuilder](/api/tracon.itraconbuilder/)

The Tracon configuration chain.

`configure` [Action](https://learn.microsoft.com/dotnet/api/system.action\-1)<[TraconTenancyOptions](/api/tracon.tracontenancyoptions/)\>

The resolution settings.

#### Returns

 [ITraconBuilder](/api/tracon.itraconbuilder/)

The builder, for chaining.

#### Remarks

The **claim is preferred** as the tenant source; the header
path must be opened explicitly and, because it can be spoofed, should only
be used inside a trusted network. Details:
[TraconTenancyOptions](/api/tracon.tracontenancyoptions/).

```csharp
builder.AddTracon()
       .UseOpenAI(apiKey)
       .UsePostgreSql(connectionString)
       .UseTenancy(options =>
       {
           options.Enabled = true;
           options.ClaimType = "tenant_id";
       });
```

#### Exceptions

 [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception)

A dependency is [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null).