How to write a binary file in C#

Writing Binary to a Stream

The Write overloaded method is used to write primitive data types to a stream. The Write method can write a Boolean, Byte, Char, Decimal, Double, and Integer data types. 

The following code snippet creates a BinaryWriter and writes string, Boolean, integer and double data types to the stream. 

string authorName = "Mahesh Chand";

int age = 30;

string bookTitle = "ADO.NET Programming using C#";

bool mvp = true;

double price = 54.99;

using (BinaryWriter binWriter =

    new BinaryWriter(File.Open(fileName, FileMode.Create)))

{

    // Write string 

    binWriter.Write(authorName);

    // Write string 

    // Write integer

    binWriter.Write(age);

    binWriter.Write(bookTitle);

    // Write boolean

    binWriter.Write(mvp);

    // Write double 

    binWriter.Write(price);

}              

Learn More: 

Create a binary file in C#