How to convert user entered text into C# code

I have a HTML input in my web app, where the user can enter some sort of filter criteria:

Type='Person' && Name='Bob' && Hobby='Reading'

Say I have a C# classes:

public abstract class Something {
 public string Type { get; set; }
}

public class Person:Something  {
 public string Name { get; set; }
 public string Hobby { get; set; }
}

public class Animal:Something  {
 public string Breed { get; set; }
 public string Color { get; set; }
}

Then I have some sort of Processor method:

Process(Something obj) {
  // use the user text to decide what to do
}

How would I:

1. Go about parsing the user entered text, to indicate if it is valid or invalid?
2. Map the entered text into my incoming object in Process?

Thanks.