A DataSet is derived from an XML schema. An XML schema can:

1. Describe 'shape' of the DataSet. In other words, it tells if the data is related or hierarchical.
2. Validate the data being imported.
3. Establish the relational structure of database tables.

Let's create a sample DataSet with the XML designer. We will assume that we are creating a DataSet for a new table called MyTable:

1. Open a windows project.
2. Select Add New Item from File menu.
3. Select a DataSet and give it some name and then click open.
4. Select the XML tools tab and drag an element on the designer.
5. In place of 'Element1' type the name of the table (MyTable).
6. Go to the next row in the element. Click the dropdown in the 1st column and select 'Attribute'.
7. In the second column type the name of the attribute and select attribute type from the third column.
8. You can add all the columns you need. You can also drag 'Key' from the toolbox and define a key for your table.
9. Save the schema.
10. Now, if you want another table, just follow the same steps over.