| Add(Char) | Adds a single character to the hash code. |
| Add(ReadOnlySpanChar) | Adds the content of a read-only character span to the hash code. |
| Add(StringBuilder) | Adds the content of a StringBuilder to the hash code. |
| Add(StringBuilder, Int32) | Adds a sequence of characters from the content of a StringBuilder to the hash code that begins with startIndex and reaches to the end of builder. |
| Add(StringBuilder, Int32, Int32) | Adds a sequence of characters from the content of a StringBuilder to the hash code that begins with startIndex and contains count characters. |