| ContainsNonAscii(StringBuilder) | Indicates whether the StringBuilder contains Unicode characters that do not belong to the ASCII character set. |
| ContainsNonAscii(StringBuilder, Int32) | Examines a section of the StringBuilder that begins at startIndex to see whether it contains Unicode characters that do not belong to the ASCII character set . |
| ContainsNonAscii(StringBuilder, Int32, Int32) | Examines a section of the StringBuilder that begins at startIndex and includes count characters to determine whether this section contains Unicode characters that do not belong to the ASCII character set. |