Creating and Using Namespaces in visual basic.Net

Namespaces help you to create logical groups of related classes and interfaces.

Need for Namespace

NameSpaces allow us to organize Classes so that they can be easily accessed in other applications. Namespaces enable us to avoid any naming conflicts between classes that have the same name. We can use two classes with the same name in an application provided they belong to different namespaces.

namespaces in database application

How do you implement namespaces in a database application? What are the benefits of using namespaces in a database application? For all this read Database programming using visual basic, c# (c sharp) sql server.

For example, we create a new class named TextBox to accept only an integer type of value. However, if we want to use the VS.Net TextBox control in the same project, there will be a conflict in the name. When we create a Namespace, we will be able to easily distinguish between the Class TextBox created by us and the one provided by VS.Net.

Creating Namespaces in visual basic.Net

Every project in Visual Basic.Net has a root namespace, which is set in the Property page of the project. When we create a project, by default, the name of the root namespace for the project is set to the name of the new project. For example, the root namespace for a project named MyProject is MyProject. Usually, when we create a project, we would like to give it a name which we like.

So, we need to change the MyProject to the name which we wish. We will name the project as Acct1.

We can also organize classes using the Namespace keyword.

For example, you can create a user-defined namespace called EmpNamespace in the project called Acct1 and place the class EmpClass within the EmpNamespace block.

Namespace EmpNamespace

Class EmpClass

End Class

End Namespace

The fully qualified or proper usage of the class EmpClass will be:


The .Net framework uses a dot(.) as a delimiter between classes and namespaces.

Using Namespaces in visual basic.Net

We have created a Namespace in the previous step. Now, we will use the Namespace explicitly through direct addressing or implicitly through the Imports statement.

Direct addressing involves directly accessing any class in the namespace by providing the fully qualified name.

Example of using fully qualified name is given below:
Microsoft.VisualBasic.MsgBox("Using Fully Qualified Name")

If we want to make all the classes in a given namespace available without the need to type the entire namespace each time, you can use the Imports statement. An example of using the Imports statement is given below:

Imports Microsoft.VisualBasic


MsgBox("Using Imports Statement")

Similarly, in the example we have chosen:

Imports Acct1.EmpNameSpace

Namespaces are of two types, Local and Global. Local Namespaces are accessible only to the applications to which they belong. Global Namespaces are accessible from all applications.


In this article we have learnt the need for a NameSpace, created one and used it in an example.

More on Namespaces - namespace examples

cover image of azure cloud book

Develop Azure Applications

Azure Cloud is gaining popularity and is competing with Amazon Elastic Cloud and Google Cloud for a spot in the billion dollar Cloud computing space.

With this book learn how to use - Table (an Azure Table is different from a SQL Server Table), Queue, Blob storage services, use your local machine to create an Application and a Service, how Azure splits a Table to achieve Load Balancing, Scalability based on the Partition Key, AppFabric Service Bus, Access Control Service, role of Fabric Controller, features of Azure SQL Database and Content Delivery Network.

Many have mastered Cloud Programming and are enjoying the benefits. Why not you?

View Highlights » View Contents »
cover image of foundation database programming book

Create your Own Accounting Software

A foundation book to Master Accounting Software Development, VB.Net, C# and OOPs programming. Detailed explanation of the Accounting domain for programmers is included. SQL and ADO.Net is also covered in detail.

This book gives you a strong foundation in Application Development.

A thorough understanding of the contents will enable you to grasp the topics covered in the accompanying books quite easily. This is because, the accounting domain is dealt with great detail in this book.

The ideal book to get started with application development in the .Net world.

View Highlights » View Contents »

cover image of book

Create your Own WEB ERP Software using ASP.Net

This book opens you to the Web. Using ASP.Net, C# and SQL Server as the tools, you will learn to build a Multi Tier Web Application as recommended by Microsoft. You will learn implementing inline GridView control, Transaction Management for a layered Web Application, build Data Access component and a Business Layer component.

Opens you to a world of opportunities. You will be able to develop a Web ERP application including all the five modules and learn how to use the TreeView control and GridView control to implement transactions such as Purchase Invoice, Sales Order and Sales Invoice.

View Highlights » View Contents »
cover image of entity framework book

ASP.Net MVC 5 Application Development Using Entity Framework 6 and VS 2015

Entity frameworks is the latest buzz in .Net programming and is the data access technology for Microsoft OS based hand held devices and web applications. Learn to integrate EF into an ASP.Net Application and MVC application. Create, explore and query the Entity Data Model. Learn how to use ObjectDataSource control and GridView control in an ASP.Net Application.

Also, learn to build Three-Tier ASP.Net application, create a business-class, implement methods in the class to perform CRUD operations and bind a GridView to the ObjectDataSource control. Learn how to handle concurrency and managing Transactions.

View Contents »