---
title: Activity
summary: API reference for Activity.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.SAIFCode.Core
reference_type: package
---

# Activity

`Activity` is a data-carrier contract (DTO) in the Collections area of SAIF.SAIFCode.Core, exposing the properties SAIF.Services and its consumers read and populate for this entity*.

## Purpose
- Carries data for the Collections area, consumed by SAIF.Services and other layers that reference this library's contracts*.

## Context
- Namespace: `SAIF.Core.Contracts.Collections`
- Kind: Class
- Assembly/package: `SAIF.Core` (NuGet package `SAIF.SAIFCode.Core`)

## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| `Id` | `long Id { get; set; }` | Represents the ID associated with this Activity*. |
| `ActivityDate` | `DateTime ActivityDate { get; set; }` | Records the date of the activity*. |
| `ActivityAmount` | `decimal ActivityAmount { get; set; }` | Records the monetary amount of the activity*. |
| `ExpirationDate` | `DateTime? ExpirationDate { get; set; }` | Records the date of the expiration*. |
| `UpdateDate` | `DateTime UpdateDate { get; set; }` | Records the date of the update*. |
| `UpdateUser` | `string UpdateUser { get; set; }` | Identifies the user tied to the update on this Activity*. |
| `UpdateNum` | `int UpdateNum { get; set; }` | Represents the update num associated with this Activity*. |
| `CaseId` | `long CaseId { get; set; }` | Uniquely identifies the case value recorded on this Activity*. |
| `ActivityCode` | `ActivityCode ActivityCode { get; set; }` | Classifies the activity using a coded value*. |
| `Case` | `Case Case { set; }` | Represents the case associated with this Activity*. |

> **Note:** Statements marked with `*` were inferred from code structure, naming
> conventions, or contextual evidence where direct confirmation was not available
> in source artifacts. Statements marked with `**` could not be confirmed; treat
> as unknown until verified.

## Sources
- Core/SAIF.Core/Contracts/Collections/Activity.cs