How do I create a SHA256 Hash with Salt?

Question

I am currently working on a visual studio C# windows form project. However, I am confused by how SHA256 + salted works. I found some examples online but unable to understand how

Answer 1

For the first question look at CC Inc's answer.

To the second point: MessageBox.Show(sha256encrypt(textBox1.Text, "SampleUserName"));

3) Yes, it is.

You can compare two strings with the == comparator or string.Equals().

public bool compareHashs(string hash1, string hash2){
   if(hash1.Equals(hash2) //or hash1 == hash2
      return true;
   }else{
      return false;
   }  
}

Answer 2

What you would do is, on the click of the button, pass the textbox value and username to the sha256encrypt function, for example:

    private void button1_Click(object sender, EventArgs e)
    {
        sha256encrypt(textBox1.Text, "SampleUserName");
    }

For the second question, do the same but with Messagebox.Show:

    private void button1_Click(object sender, EventArgs e)
    {
        MessageBox.Show(sha256encrypt(textBox1.Text, "SampleUserName"));
    }

Third point: I am not sure exactly what you mean, but if you want to Salt a text and compare it with the Hashed text:

if(sha256encrypt("password", "username") == CreateSalt("password"))
   return true;
else
   return false;

Or if you want to compare them manually:

MessageBox.Show(sha256encrypt("password", "username") + "\n\r" + CreateSalt("password"));