The abstract class Expression provides the root of a class hierarchy used to model expression trees.

The classes in this namespace that derive from Expression, for example MemberExpression and ParameterExpression, are used to represent nodes in an expression tree. The Expression class contains static (Shared in Visual Basic) factory methods to create expression tree nodes of the various types.

The enumeration type ExpressionType specifies the unique node types.

 Classes

	Class	Description
	BinaryExpression	Represents an expression that has a binary operator.
	ConditionalExpression	Represents an expression that has a conditional operator.
	ConstantExpression	Represents an expression that has a constant value.
	ElementInit	Represents an initializer for a single element of an IEnumerable collection.
	Expression	Provides the base class from which the classes that represent expression tree nodes are derived. It also contains static (Shared in Visual Basic) factory methods to create the various node types. This is an abstract class.
	Expression<(Of <(TDelegate>)>)	Represents a strongly typed lambda expression as a data structure in the form of an expression tree. This class cannot be inherited.
	InvocationExpression	Represents an expression that applies a delegate or lambda expression to a list of argument expressions.
	LambdaExpression	Describes a lambda expression.
	ListInitExpression	Represents a constructor call that has a collection initializer.
	MemberAssignment	Represents initializing a field or property of a newly created object.
	MemberBinding	Provides the base class from which the classes that represent bindings that are used to initialize members of a newly created object derive.
	MemberExpression	Represents accessing a field or property.
	MemberInitExpression	Represents calling a constructor and initializing one or more members of the new object.
	MemberListBinding	Represents initializing the elements of a collection member of a newly created object.
	MemberMemberBinding	Represents initializing members of a member of a newly created object.
	MethodCallExpression	Represents calling a method.
	NewArrayExpression	Represents creating a new array and possibly initializing the elements of the new array.
	NewExpression	Represents a constructor call.
	ParameterExpression	Represents a named parameter expression.
	TypeBinaryExpression	Represents an operation between an expression and a type.
	UnaryExpression	Represents an expression that has a unary operator.

 Enumerations

	Enumeration	Description
	ExpressionType	Describes the node types for the nodes of an expression tree.
	MemberBindingType	Describes the binding types that are used in MemberInitExpression objects.

 See Also

Reference

Other Resources

Expression Trees