BinaryReader is a class in the .NET Framework that provides methods for reading binary data from a stream. It is used to read data that was previously written to a stream in a specific binary format, such as when deserializing data or reading from a binary file. The BinaryReader class is part of the System.IO namespace in .NET.
To use BinaryReader, you need to first create an instance of the class and pass a stream to its constructor. Once you have a BinaryReader object, you can use its methods to read different types of data from the stream.
Here is an example of using BinaryReader to read data from a file:
using System;
using System.IO;
class Program
{
static void Main(string[] args)
{
// Create a FileStream to read from a file
using (FileStream stream = new FileStream("data.bin", FileMode.Open))
{
// Create a BinaryReader to read binary data from the stream
using (BinaryReader reader = new BinaryReader(stream))
{
// Read the data from the file
string message = reader.ReadString();
int number = reader.ReadInt32();
bool flag = reader.ReadBoolean();
// Print the data to the console
Console.WriteLine(message);
Console.WriteLine(number);
Console.WriteLine(flag);
}
}
}
}
In this example, we create a FileStream object to read from a file named "data.bin". We then create a BinaryReader object using the FileStream object as its argument. The ReadString, ReadInt32, and ReadBoolean methods of the BinaryReader object are then used to read a string, an integer, and a boolean value from the stream in binary format.
When the code is executed, it will read the data from the binary file named "data.bin" in the same directory as the program. The data will then be printed to the console.
It is important to note that when using BinaryReader to read data in binary format, the same format must have been used when writing the data to the stream using a BinaryWriter or similar class. If the data was not written in the same format, it may not be interpreted correctly.
In addition to the Read methods, the BinaryReader class also provides methods for reading other data types from the stream, such as floats, doubles, and decimal values. The class also provides methods for reading variable-length data, such as strings and arrays, in a compact binary format.
In summary, BinaryReader is a class in the .NET Framework that provides methods for reading binary data from a stream. It is commonly used when deserializing data or reading from a binary file.
