Custom Editor Properties Loose Value on Play

Unity Engine
1 
public class SomeComponent : MonoBehaviour {

[SerializeField] private int _someValue;

  public int SomeValue
{
     get { return _someValue; }
     set
     {
         if (_someValue == value) return;
         _someValue = value;
     }
}
}

–

 public override void OnInspectorGUI()
{
     Target.SomeValue = EditorGUILayout.IntField("Some Value", Target.SomeValue);
}

Before play I can assign a value to SomeValue (which applies the value to _someValue). When hitting play the value resets to 0.

I set a breakpoint at the setter and it does not get set to 0, it is initiaized at 0.

2

Try adding EditorUtility.SetDirty(Target).