// BinaryExpression
private void DefaultWalk(BinaryExpression node)
{
if (Walk(node)) {
WalkNode(node.Left);
WalkNode(node.Right);
}
PostWalk(node);
}
public static BinaryExpression Update(this BinaryExpression expression, Expression left, Expression right)
{
return(expression.Update(left, expression.Conversion, right));
}