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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
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("
Value = "+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 −
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("
Value = "+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
Updated on: 04-Dec-2019
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