Csharp/C Sharp/File Stream/Memory Stream

Create a MemoryStream

 
using System;
using System.IO;
class MemStreamApp
{
    static void Main(string[] args)
    {
        MemoryStream m = new MemoryStream(64);
        Console.WriteLine("Length: {0}\tPosition: {1}\tCapacity: {2}",m.Length, m.Position, m.Capacity);
   
        for (int i = 0; i < 64; i++)
        {
            m.WriteByte((byte)i);
        }
        Console.WriteLine("Length: {0}\tPosition: {1}\tCapacity: {2}",m.Length, m.Position, m.Capacity);
   
        byte[] ba = m.GetBuffer();
        foreach (byte b in ba)
        {
            Console.Write("{0,-3}", b);
        }
   
        m.Close();
    }
}

MemoryStream.ToArray, MemoryStream.ReadDecimal

 
using System;
using System.IO;
class MainClass
{
    public static byte[] DecimalToByteArray (decimal src){
        using (MemoryStream stream = new MemoryStream()) {
           using (BinaryWriter writer = new BinaryWriter(stream)){
               writer.Write(src);
               return stream.ToArray();
           }
        }
    }
    public static decimal ByteArrayToDecimal (byte[] src){
        using (MemoryStream stream = new MemoryStream(src)){
           using (BinaryReader reader = new BinaryReader(stream)){
              return reader.ReadDecimal();
           }
        }
    }
    public static void Main()
    {
        byte[] b = null;
        b = BitConverter.GetBytes(true);
        Console.WriteLine(BitConverter.ToString(b));
        Console.WriteLine(BitConverter.ToBoolean(b, 0));
        b = BitConverter.GetBytes(3678);
        Console.WriteLine(BitConverter.ToString(b));
        Console.WriteLine(BitConverter.ToInt32(b, 0));
        b = DecimalToByteArray(285998345545.563846696m);
        Console.WriteLine(BitConverter.ToString(b));
        Console.WriteLine(ByteArrayToDecimal(b));
    }
    
}

MemoryStream.Write

 
using System;
using System.IO;
public class MemTest {
    public static void Main() {
        MemoryStream memOut = new MemoryStream();
        byte[] bs = { 1, 2, 3, 4, 5, 6 };
        memOut.Write(bs, 0, bs.Length);
        memOut.Seek(+3, SeekOrigin.Begin);
        byte b = (byte)memOut.ReadByte();
        Console.WriteLine("Value: " + b);
    }
}

Use MemoryStream and BinaryReader to convert Byte array to decimal

using System;
using System.IO;
class Test {
    public static byte[] DecimalToByteArray (decimal src) {
        using (MemoryStream stream = new MemoryStream()) {
            using (BinaryWriter writer = new BinaryWriter(stream)){
                writer.Write(src);
                return stream.ToArray();
            }
        }
    }
    public static decimal ByteArrayToDecimal (byte[] src) {
        using (MemoryStream stream = new MemoryStream(src)) {
            using (BinaryReader reader = new BinaryReader(stream)) {
                return reader.ReadDecimal();
            }
        }
    }
    public static void Main() {
        byte[] b = BitConverter.GetBytes(true);
        // Convert a decimal to a byte array and display.
        b = DecimalToByteArray(12345678987654321.563846696m);
        Console.WriteLine(BitConverter.ToString(b));
        // Convert a byte array to a decimal and display.
        Console.WriteLine(ByteArrayToDecimal(b));
    }
}

Use MemoryStream and BinaryWriter to convert decimal to byte array

using System;
using System.IO;
class Test {
    // Create a byte array from a decimal.
    public static byte[] DecimalToByteArray (decimal src) {
        using (MemoryStream stream = new MemoryStream()) {
            using (BinaryWriter writer = new BinaryWriter(stream)){
                writer.Write(src);
                return stream.ToArray();
            }
        }
    }
    public static void Main() {
        byte[] b = DecimalToByteArray(285998345545.563846696m);
        // Convert a decimal to a byte array and display.
        Console.WriteLine(BitConverter.ToString(b));
    }
}