> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stigg.io/llms.txt
> Use this file to discover all available pages before exploring further.

# C#

<Update label="0.6.0" description="2026-03-19">
  * Added: `billingCycleAnchor` property when provisioning and updating subscriptions. Accepts `SubscriptionBillingCycleAnchor.UNCHANGED` (default) to keep the existing billing cycle anchor, or `SubscriptionBillingCycleAnchor.NOW` to reset it to the current timestamp.
</Update>

<Update label="0.5.0" description="2026-01-29">
  * Updated stainless config for API
</Update>

<Update label="0.4.0" description="2026-01-28">
  * API updates
  * Handle unions containing unknown types properly
  * Improved HttpResponse qualification
</Update>

<Update label="0.3.1" description="2026-01-27">
  * Removed custom code
</Update>

<Update label="0.3.0" description="2026-01-27">
  * API updates
  * Improved cursor pagination
</Update>

<Update label="0.2.0" description="2026-01-27">
  * API update
  * Commented out promotional endpoints
</Update>

<Update label="0.1.0" description="2026-01-26">
  **Features:**

  * Added `ToString` and `Equals` methods
  * Visibility changes to QueryString() and AddDefaultHeaders
  * SDK configuration and copy constructor tests
</Update>