| ToUpperInvariant(StringBuilder) | Converts the entire content of a StringBuilder to uppercase letters using the rules of the invariant culture. |
| ToUpperInvariant(StringBuilder, Int32) | Converts the content of a StringBuilder starting with startIndex into uppercase letters and uses the rules of the invariant culture. |
| ToUpperInvariant(StringBuilder, Int32, Int32) | Converts the content of a section in StringBuilder that begins at startIndex and includes count characters to uppercase using the rules of the invariant culture. |