> For the complete documentation index, see [llms.txt](https://docs.wisej.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/docs/controls/other-components/dataset.md).

# DataSet

The Wisej.NET `DataSet` component provides an in-memory cache of data retrieved from a data source, serving as a key component of the ADO.NET architecture. A `DataSet` contains a collection of `DataTable` objects that can be related through `DataRelation` objects. Data integrity is maintained using `UniqueConstraint` and `ForeignKeyConstraint` objects.

## Features

### Table Management

The `DataTableCollection`, accessed through the `Tables` property, contains the data tables. Table names are conditionally case-sensitive - if "mydatatable" exists but "Mydatatable" doesn't, searches become case-insensitive.

### Data Relations

The `DataRelationCollection` enables navigation through table hierarchies, establishing relationships between tables in the `DataSet`.

### XML Integration

The `DataSet` supports XML operations for data and schema:

* `WriteXmlSchema`: Save schema as XML
* `WriteXml`: Save both schema and data
* `ReadXml`: Load XML documents containing schema and data

{% hint style="info" %}
For detailed information about working with DataSets, see:

* [DataSets, DataTables, and DataViews](https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/dataset-datatable-dataview/)
* [Creating a DataTable](https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/dataset-datatable-dataview/creating-a-datatable)
* [System.Data.DataSet on MSDN](https://docs.microsoft.com/en-us/dotnet/api/system.data.dataset?view=net-5.0)
  {% endhint %}


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