Setting the value of a read only property in C#

Question

I'm trying to make a mod for a game in c# and I'm wondering if there's a way to change the value of a read only property using reflections.

Answer 1

In general, no.

Three examples:

public int Value { get { return _value + 3; } } // No

public int Value { get { return 3; } } // No

public int Value { get; private set; } // Yes

So, you can change the value of the property while this property has corresponding private, protected or internal field.

Answer 2

You can in both those scenarios:

readonly int value = 4;

and

int value {get; private set}

using

typeof(Foo)
   .GetField("value", BindingFlags.Instance)
   .SetValue(foo, 1000); // (the_object_you_want_to_modify, the_value_you_want_to_assign_to_it)

You cannot modify

int value { get { return 4; } }

though.

If it returns a calculated value like

int value { get { return _private_val + 10; } }

you would have to modify _private_val accordingly.