Get PropertyInfo of a parameter passed as lambda expression

Question

For example, I have a class:

public class Person
{
  public int Id;
  public string Name, Address;
}

and I want to call a method to update

Answer 1

Here is a version of @DanielMöller's answer updated for modern syntax, with specified exception messages, and documentation.

/// 

///     Gets the corresponding  from an .
/// 
/// The expression that selects the property to get info on.
/// The property info collected from the expression.
/// When  is null.
/// The expression doesn't indicate a valid property."
private PropertyInfo GetPropertyInfo(Expression> property)
{
    if (property == null) {
        throw new ArgumentNullException(nameof(property));
    }

    if (property.Body is UnaryExpression unaryExp) {
        if (unaryExp.Operand is MemberExpression memberExp) {
            return (PropertyInfo)memberExp.Member;
        }
    }
    else if (property.Body is MemberExpression memberExp) {
        return (PropertyInfo)memberExp.Member;
    }

    throw new ArgumentException($"The expression doesn't indicate a valid property. [ {property} ]");
}