Question

How to convert byte array to int in C#

Answer 1

using System;

class Program {
    static void Main() {
        byte[] bytes = { 0, 1, 0, 0 };

        int n = BitConverter.ToInt32(bytes, 0);

        Console.WriteLine(n);
    }
}




/*
run:

256

*/

 

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Answer 2

using System;
 
class Program {
    static void Main() {
        byte[] bytes = { 0, 0, 2, 1 }; // 2 * 256 + 1
 
 
        if (BitConverter.IsLittleEndian)
            Array.Reverse(bytes);
            
        int n = BitConverter.ToInt32(bytes, 0);
        
        Console.WriteLine(n);
    }
}
 
 
 
 
/*
run:
 
513
 
*/

 

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