System.Linq.Expressions

Namespace for expression trees, which represent code in a tree-like data structure.

Summary

The System.Linq.Expressions namespace provides types that represent expression trees. Expression trees are a way to represent code in a tree-like data structure. They are often used in conjunction with LINQ to enable powerful querying and dynamic code generation.

Key types in this namespace include:

  • Expression<TDelegate>: Represents a lambda expression.
  • Expression: An abstract base class for all expression tree nodes.
  • MethodCallExpression, MemberExpression, ConstantExpression, etc.: Concrete classes representing specific types of expressions.
namespace System.Linq.Expressions {
    // ... classes ...
}

Classes

Delegates

Members

This namespace contains a rich set of types for building and manipulating expression trees. You can represent almost any C# code construct, from simple variable assignments to complex method calls and conditional logic, as an expression tree.

Expression trees are invaluable for:

  • Dynamically building queries that can be translated to other data sources (e.g., SQL).
  • Implementing aspect-oriented programming.
  • Creating domain-specific languages (DSLs).
  • Performing code analysis and manipulation.