How to VB.NET BinaryWriter

The BinaryWriter object operates at a lower level within the realm of Streams, serving as a powerful tool for writing primitive types as binary values to a specific encoding stream. It excels in handling the intricacies of binary data, allowing for efficient serialization and storage of such information.

To effectively utilize the BinaryWriter object, it is necessary to work in conjunction with Stream objects that grant access to the underlying bytes. These Stream objects serve as the foundation, providing the necessary access and data destination for the BinaryWriter to operate upon.

Creating a BinaryWriter object follows a systematic process. Firstly, you need to instantiate a FileStream object, which establishes a connection to the desired file or data destination. This FileStream object acts as a bridge between the BinaryWriter and the underlying data, enabling seamless writing and serialization of binary data.

Dim writeStream As FileStream writeStream = New FileStream("c:\testBinary.dat", FileMode.Create) Dim writeBinay As New BinaryWriter(writeStream)

Once the FileStream object is established, it is passed as a parameter to the constructor method of the BinaryWriter, facilitating the creation of the BinaryWriter object. This linkage ensures that the BinaryWriter is properly connected to the FileStream, enabling the smooth flow of binary data.

One of the primary advantages of storing files in binary format is its superior space utilization. By representing data in binary form, it optimizes the usage of storage resources. Binary format often results in smaller file sizes compared to other formats, which leads to efficient storage and utilization of memory.

Another advantage of binary information is that it is not easily human-readable. Binary data is composed of sequences of 0s and 1s, making it challenging for humans to interpret and understand directly. This characteristic provides an added layer of security and confidentiality, as it reduces the risk of unauthorized access or tampering with the data.

Full Source VB.NET
Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Dim writeStream As FileStream Try writeStream = New FileStream("c:\testBinary.dat", FileMode.Create) Dim writeBinay As New BinaryWriter(writeStream) writeBinay.Write("This is a test for BinaryWriter !") writeBinay.Close() Catch ex As Exception MsgBox(ex.ToString) End Try End Sub End Class

Binary format allows for precise control and manipulation of individual bits and bytes. This level of control is particularly useful in low-level programming tasks, such as network protocols or device driver development. Binary format provides a granular representation of data, enabling efficient bitwise calculations, bit-level operations, and direct interaction with hardware components.


The advantages of storing files in binary format include optimal space utilization, enhanced security, and fine-grained control over data at the binary level. However, it's important to note that working with binary data requires specialized knowledge and tools to properly interpret and process the information.