Decompile Expression

Question

When I try to decompile code with dotPeek, i get this:

public static Expression<Func<TInput, object>> ToUntypedPropertyExpression<TInput, TOutput>(this Expression<Func<TInput, TOutput>> expression)
{
  string name = (expression.Body as MemberExpression ?? ((UnaryExpression) expression.Body).Operand as MemberExpression).Member.Name;
  ParameterExpression parameterExpression;
  return Expression.Lambda<Func<TInput, object>>((Expression) Expression.Convert((Expression) Expression.Property((Expression) parameterExpression, name), typeof (object)), new ParameterExpression[1]
  {
    parameterExpression
  });
}

But when I want to copy this to another class, outside the dll, it fails. (because it says that the parameterExpression is empty). Can someone help me rewrite this so it works?

Answer 1

Try putting in the second line (the one with ParameterExpression parameterExpression;)

ParameterExpression parameterExpression = expression.Parameters[0];

And all the (Expression) casts are useless. You can remove them.