Visualizer treeview

The treeview shows the various objects that make up the expression tree:

The emphasis is on displaying the structure of the expression tree:

• Not every property becomes a child node; only properties which return specific types which are part of the expression tree's structure, such as Expression and CaseBlock

• There are no child nodes for properties which return collections -- LambdaExpression.Parameters, Block.RuntimeVariables; instead, each element gets its own child node. For example, LambdaExpression has a Parameters property, which returns a ReadOnlyCollection<ParameterExpression>; but the tree doesn't have a child node for Parameters, only for the individual elements -- Parameter[0], Parameter[1] etc.:

  

Node properties

Given the following node:

The following properties are shown for each node:

| Description | In highlighted example | Applies to | | -- | -- | -- | -- | | Path from parent node | Left - | Every node | | Node type | MemberAccess | ConstantExpression
DefaultExpression
closed-over variables | | System.Type of expression | (int) | Expression and subtypes
CallSiteBinder and subtypes | | Name | firstVariable | ParameterExpression if it has one
MemberExpression
MethodCallExpression
LambdaExpression if it has one
MemberBinding -- bound member's name | | Value of the expression, as a literal | = 5 | ConstantExpression
DefaultExpression
closed-over variables |