. Net getting the CRC32 identity of a file

public class FileToCRC32 {private static uint32[] crc32table = {0x00000000,0x77                                  073096,0XEE0E612C,0X990951BA, 0X076DC419,0X706AF48F,0XE963A535,0X9E6495A3, 0x0edb8832,0x79dcb8a4,0xe0d5e91e,0x97d2d988, 0x09b64c2b,0x7eb17cbd,0xe                                  7b82d07,0x90bf1d91, 0x1db71064,0x6ab020f2,0xf3b97148,0x84be41de, 0X1ADAD47D,0X6DDDE4EB,0XF4D4B551,0X83D385C7, 0x136c9856,0x646ba8c0,0xfd62f97a,0x 8A65C9EC, 0X14015C4F,0X63066CD9,0XFA0F3D63,0X8D080DF5, 0                                  x3b6e20c8,0x4c69105e,0xd56041e4,0xa2677172, 0x3c03e4d1,0x4b04d447,0xd20d85fd,0xa50ab56b, 0x35b5a8fa,0x42b2986c,0xdbbbc9d6,0xacbcf940, 0x32d86ce3, 0x45df5c75,0xdcd60dcf,0xabd13d59, 0x26d930ac,0x51de003a,0xc8d75180,0xbfd06116, 0                                  x21b4f4b5,0x56b3c423,0xcfba9599,0xb8bda50f, 0x2802b89e,0x5f058808,0xc60cd9b2,0xb10be924, 0x2f6f7c87,0x58684c11,0xc1611dab,0xb6662d3d, 0x76dc4190,                                  0X01DB7106,0X98D220BC,0XEFD5102A, 0x71b18589,0x06b6b51f,0x9fbfe4a5,0xe8b8d433, 0x7807c9a2,0x0f00f934,0x9609a88e,0xe10e9818, 0x7f6a0dbb,0x086d3d2d                                  , 0X91646C97,0XE6635C01, 0x6b6b51f4,0x1c6c6162,0x856530d8,0xf262004e, 0x6c0695ed,0x1b01a57b,0x8208f4c1,0xf50fc457, 0x65b0d9c6,0x12b7e950,0x8bbeb8e                                  a,0xfcb9887c, 0x62dd1ddf,0x15da2d49,0x8cd37cf3,0xfbd44c65, 0x4db26158,0x3ab551ce, 0xa3bc0074,0xd4bb30e2, 0X4ADFA541,0X3DD895D7,0XA4D1C46D,0XD3D6F4FB, 0X4369E96A,0X346ED9FC,0XAD678846,0XDA60B8D0, 0X44042D73,0X33031DE5,0XAA0A4C5                                  F,0XDD0D7CC9, 0x5005713c,0x270241aa,0xbe0b1010,0xc90c2086, 0x5768b525,0x206f85b3,0xb966d409,0xce61e49f, 0x5edef90e,0x29d9c998,0xb0d09822,0xc7d7a8 B4, 0x59b33d17,0x2eb40d81,0xb7bd5c3b,0xc0ba6cad, 0xedb88                                  320,0x9abfb3b6,0x03b6e20c,0x74b1d29a, 0xead54739,0x9dd277af,0x04db2615,0x73dc1683, 0xe3630b12,0x94643b84,0x0d6d6a3e,0x7a6a5aa8, 0xe40ecf0b,0x9309                                  Ff9d,0x0a00ae27,0x7d079eb1, 0xf00f9344,0x8708a3d2,0x1e01f268,0x6906c2fe, 0xf762575d,0x806567cb,0x196c3671,0x6e6b06e7, 0XFED41B76,0X89D32BE0,0X10DA7A5A,0X67DD4ACC, 0xf9b9df6f,0x8ebeeff9,0x17b7be43,0x60b08ed5, 0XD6D6A3E8,0XA1D1                                  937e,0x38d8c2c4,0x4fdff252, 0XD1BB67F1,0XA6BC5767,0X3FB506DD,0X48B2364B, 0xd80d2bda,0xaf0a1b4c,0x36034af6,0x41047a60, 0xdf60efc3,0xa867df55,0x316                                  E8eef,0x4669be79, 0xcb61b38c,0xbc66831a,0x256fd2a0,0x5268e236, 0XCC0C7795,0XBB0B4703,0X220216B9,0X5505262F, 0xc5ba3bbe,0xb2bd0b28,0x2bb45a92,0x5c B36a04, 0XC2D7FFA7,0XB5D0CF31,0X2CD99E8B,0X5BDEAE1D, 0x9                           B64C2B0,0XEC63F226,0X756AA39C,0X026D930A, 0x9c0906a9,0xeb0e363f,0x72076785,0x05005713,       0x95bf4a82,0xe2b87a14,0x7bb12bae,0x0cb61b38, 0x92d28e9b,0xe5d5be0d,0x7cdcefb7,0x0b DBDF21, 0x86d3d2d4,0xf1d4e242,0x68ddb3f8,0x1fda836e, 0x8                                  1be16cd,0xf6b9265b,0x6fb077e1,0x18b74777, 0X88085AE6,0XFF0F6A70,0X66063BCA,0X11010B5C, 0x8f659eff,0xf862ae69,0x616bffd3,0x166ccf45, 0xa00ae278,0x                                  D70DD2EE,0X4E048354,0X3903B3C2, 0xa7672661,0xd06016f7,0x4969474d,0x3e6e77db, 0XAED16A4A,0XD9D65ADC,0X40DF0B66,0X37D83BF0, 0xa9bcae53,0xdebb9ec5,0                                  X47b2cf7f,0x30b5ffe9, 0xbdbdf21c,0xcabac28a,0x53b39330,0x24b4a3a6, 0XBAD03605,0XCDD70693,0X54DE5729,0X23D967BF, 0XB3667A2E,0XC4614AB8,0X5D681B02,             0x2a6f2b94,                     0XB40BBE37,0XC30C8EA1,0X5A05DF1B,0X2D02EF8D}; <summary>///CRC32 Identification of documents///</summary>//<param name= "FilePath" ></param >//<returns></returns> public static string GetFileCRC32 (String filePath) {const S        Tring FOO = "-"; if (string.        IsNullOrEmpty (FilePath)) {return FOO; }if (!            File.exists (FilePath)) {return FOO;}            Maximum 50Mconst int max_size = * 1024x768 * 1024;var f = new FileInfo (FilePath), if (f.length >= max_size) {return FOO;}            UInt32 CRC = 0xFFFFFFFF;            var bin = file.readallbytes (FilePath);            foreach (Byte b in bin) {CRC = ((CRC >> 8) & 0x00ffffff) ^ crc32table[(crc ^ B) & 0xFF];            CRC = CRC ^ 0xFFFFFFFF; Return CRC.        ToString ("X"); }    }

. Net getting the CRC32 identity of a file