Expression Editor for WPF offers numerous advanced features that help end users create and edit complex expressions. These are as follows:

• Smart Code Completion
  Expression Editor provides recommendation of possible methods in a list box based on what you typed so far. This helps in completing expressions quickly and reduces the chances of typing errors.
  
• Syntax Highlighting
  Expression Editor uses different colors to write functions, fields, and operators. This helps in differentiating these items and enhancing the readability of expressions, especially when the expressions span across multiple lines.
  
• Pre-defined Operators and Functions 
  Expression Editor provides a wide variety of operators and functions to perform aggregate, logical, date time, math, convert and text operations for the ease of users while working with expressions.
  
• Error Reporting
  Expression Editor validates the entered expression for error detection, immediately after user has finished entering the expression. If the expression syntax is incorrect, then error message is shown within the Editor.