Topics

• Null-conditional Operators
• ReadOnlyCollections
• Regular Expressions (System.Text.RegularExpressions)

Examples

• Null-Conditional Operator
• Check if pattern matches input
• Passing Options
• Simple match and replace
• Match into groups
• Remove non alphanumeric characters from string
• Null-conditional Operator can be used with Extension Method
• Find all matches
• Creating a ReadOnlyCollection
• Updating a ReadOnlyCollection
• Warning: Elements in a ReadOnlyCollection are not inherently read-only