C# BitConverter.ToInt64() Method


The BitConverter.ToInt64() method in C# is used to return a 64-bit signed integer converted from eight bytes at a specified position in a byte array.

Syntax

The syntax is as follows −

public static long ToInt64 (byte[] val, int begnIndex);

Above, val is the byte array, whereas begnIndex is the beginning position within val.

Let us now see an example −

Example

 Live Demo

using System;
public class Demo {
   public static void Main() {
      byte[] arr = { 0, 10, 15, 20, 26, 30, 34, 42, 50};
      Console.WriteLine("Byte Array = {0} ", BitConverter.ToString(arr));
      for (int i = 0; i < arr.Length - 7; i = i + 8) {
         long res = BitConverter.ToInt64(arr, i);
         Console.WriteLine("\nValue = "+arr[i]);
         Console.WriteLine("Result = "+res);
      }
   }
}

Output

This will produce the following output −

Byte Array = 00-0A-0F-14-1A-1E-22-2A-32
Value = 0
Result = 3036022196155648512

Example

Let us now see another example −

 Live Demo

using System;
public class Demo {
   public static void Main() {
      byte[] arr = {0, 0, 0, 10, 20, 0, 0, 25, 30, 0, 0, 0, 35, 45, 55, 65, 75};
      Console.WriteLine("Byte Array = {0} ",
      BitConverter.ToString(arr));
      for (int i = 0; i < arr.Length - 7; i = i + 8) {
         long res = BitConverter.ToInt64(arr, i);
         Console.WriteLine("\nValue = "+arr[i]);
         Console.WriteLine("Result = "+res);
      }
   }
}

Output

This will produce the following output −

Byte Array = 00-00-00-0A-14-00-00-19-1E-00-00-00-23-2D-37-41-4B
Value = 0
Result = 1801439937015316480
Value = 30
Result = 4699274364531507230
raja
Published on 04-Dec-2019 13:00:22
Advertisements