Question

I have a class that encrypts a password with a salted hash.

But If I want to pass a null to the class I get the following error: Cannot implicitly convert type string to byte[]

Here is the class code:

public class MyHash
{
    public static string ComputeHash(string plainText, 
                            string hashAlgorithm, byte[] saltBytes)
    {
        Hash Code
    }
}

When I use the class I get the error: “Cannot implicitly convert type string to byte[]”

//Encrypt Password
byte[] NoHash = null;
byte[] encds = MyHash.ComputeHash(Password, "SHA256", NoHash);

Answer 1

The return type of your ComputeHash function is a string. You try to assign the result of your function to encds, which is byte[]. The compiler points this discrepancy out to you, because there is no implicit conversion from string to byte[].