We recommend using Visual Studio 2017

How to: Edit a Dataset

After creating a typed dataset, you can modify its schema by adding or editing the TableAdapters, data tables, TableAdapter queries, and relationships that make up the dataset using the Creating and Editing Typed Datasets. Visual Studio provides wizards (TableAdapter Configuration Wizard and TableAdapter Query Configuration Wizard) to help you work with some of these objects.

For information on creating datasets, see How to: Create a Typed Dataset.

To open the dataset for editing

To edit the dataset