How do I change the value of a static readonly field using reflection in c#?

Question

The SetFields method in the fieldInfo class takes objects as the first parameter. Is there a way to change the value of the static readonly fields using reflection in C#?

So far I have

var field = typeof(ClassName).GetField("FieldName",BindingFlags.Instance|BindingFlags.NonPublic);

Answer 1

If you want to get a static field then you should be using BindingFlags.Static instead of BindingFlags.Instance, as the latter is for instance fields.

You can then use field.SetValue(null, newValue) to set the value. Note that null may be passed as the target parameter, because no object instance is needed. Assuming you have sufficient privileges, reflection will happily change the value of a readonly field.

Answer 2

You're close. Your BindingFlag is incorrect. Instance means instance field Instead, you should use BindingFlags.Static:

var field = typeof(ClassName).GetField("FieldName",BindingFlags.Static|BindingFlags.NonPublic);