Is there CRC32 api in C#/.NET?

Question

Java version:

public static long crc32(byte[] data) {
    CRC32 crc32 = new CRC32();
    crc32.update(data);
    return crc32.getValue();
}

How to implement it simplely in C#/.NET?

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace wcs_csharp_sdk.main.util
{
    public class CRC32
    {
        static protected ulong[] Crc32Table;
        //生成CRC32码表
        static public void GetCRC32Table()
        {
            ulong Crc;
            Crc32Table = new ulong[256];
            int i, j;
            for (i = 0; i < 256; i++)
            {
                Crc = (ulong)i;
                for (j = 8; j > 0; j--)
                {
                    if ((Crc & 1) == 1)
                        Crc = (Crc >> 1) ^ 0xEDB88320;
                    else
                        Crc >>= 1;
                }
                Crc32Table[i] = Crc;
            }
        }
        //获取byte[]的CRC32校验值
        static public ulong GetCRC32(byte[] buffer)
        {
            //生成码表
            GetCRC32Table();
            ulong value = 0xffffffff;
            int len = buffer.Length;
            for (int i = 0; i < len; i++)
            {
                value = (value >> 8) ^ Crc32Table[(value & 0xFF) ^ buffer[i]];
            }
            return value ^ 0xffffffff;
        }

        //获取字符串的CRC32校验值
        static public ulong GetCRC32(string sInputString)
        {
            //生成码表
            GetCRC32Table();
            byte[] buffer = System.Text.ASCIIEncoding.ASCII.GetBytes(sInputString);
            ulong value = 0xffffffff;
            int len = buffer.Length;
            for (int i = 0; i < len; i++)
            {
                value = (value >> 8) ^ Crc32Table[(value & 0xFF) ^ buffer[i]];
            }
            return value ^ 0xffffffff;
        }
       
       
    }
}

Answer 2

貌似没有官方实现，百度两个吧