BlockExpression Class
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Represents a block that contains a sequence of expressions where variables can be defined.
Assembly: System.Core (in System.Core.dll)
The BlockExpression type exposes the following members.
| Name | Description | |
|---|---|---|
 | CanReduce | Indicates that the node can be reduced to a simpler node. If this returns true, Reduce() can be called to produce the reduced form. (Inherited from Expression.) |
| Expressions | Gets the expressions in this block. |
| NodeType | Returns the node type of this expression. Extension nodes should return Extension when overriding this method. (Overrides Expression::NodeType.) |
| Result | Gets the last expression in this block. |
| Type | Gets the static type of the expression that this Expression represents. (Overrides Expression::Type.) |
| Variables | Gets the variables defined in this block. |
| Name | Description | |
|---|---|---|
 | Accept | Dispatches to the specific visit method for this node type. For example, MethodCallExpression calls the VisitMethodCall. (Overrides Expression::Accept(ExpressionVisitor).) |
 | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| Reduce | Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.) |
| ReduceAndCheck | Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.) |
| ReduceExtensions | Reduces the expression to a known node type (that is not an Extension node) or just returns the expression if it is already a known type. (Inherited from Expression.) |
| ToString | Returns a textual representation of the Expression. (Inherited from Expression.) |
| Update | Creates a new expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression. |
| VisitChildren | Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible. (Inherited from Expression.) |
The Expression methods can be used to create a BlockExpression.
The following code example shows how to create a block expression. The block expression consists of two MethodCallExpression objects and one ConstantExpression object.
Show: