| IndexOfAny(String, ReadOnlySpanChar) | Returns the zero-based index of the first occurrence of one of the the specified characters in s. |
| IndexOfAny(String, ReadOnlySpanChar, Int32) | Returns the zero-based index of the first occurrence of one of the the specified characters in s. The search starts at the specified startIndex. |
| IndexOfAny(String, ReadOnlySpanChar, Int32, Int32) | Returns the zero-based index of the first occurrence of one of the the specified characters in s. The search begins at a specified index and a specified number of character positions are checked. |