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 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#