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;
   }  
}