Selecting an overloaded method based on the runtime type of an object by casting it to dynamic

    private ResultValue ProcessAstNode(AstNode.Expr.Block node)
    {
        ...
    }

    private ResultValue ProcessAstNode(AstNode node)
    {
        // Select the right method depending on the runtime type of node
        return ProcessAstNode((dynamic)node);
    }

    private ResultValue ProcessAstNode(AstNode.Expr.Block node)
    {
        ...
    }

    private ResultValue ProcessAstNode(AstNode node)
    {
        // Select the right method depending on the runtime type of node
        return ProcessAstNode((dynamic)node);
    }