[Solved] How to create byte array and fill it with random data [duplicate]
Try the Random.NextBytes method https://docs.microsoft.com/en-us/dotnet/api/system.random.nextbytes?view=netframework-4.7.2 private byte[] GetByteArray(int sizeInKb) { Random rnd = new Random(); byte[] b = new byte[sizeInKb * 1024]; // convert kb to byte rnd.NextBytes(b); return b; } If you need cryptographically safe random bytes, use System.Security.Cryptography.RNGCryptoServiceProvider instead. 7 solved How to create byte array and fill it with random data [duplicate]