Expression Tree Copy or Convert

Question

How to convert a ExpressionTree of form

Expression> exp = p => p.Age > 50;

to

Express         


        

Answer 1

Rough Steps:

 Get the expression Cast it to BinaryExpression
 Get the left operand Cast it to MemberExpression
 Get the Underlying Type that the property belong to 
 Change it to your new type if you can.

The type you get here is a property without setter as I guessed.

Expression> exp1 = o => this.ActualHeight>50;
var type = ((MemberExpression)((BinaryExpression)exp1.Body).Left).Expression.Type;

So you must build a new expression

Here is the way

manually build linq expression for x => x.Child == itemToCompare.Child