RealityMachina

Type type = __instance.GetType();
                        MethodInfo methodInfo = type.GetMethod("OnImpact", BindingFlags.NonPublic | BindingFlags.Instance);
                        object[] parametersArray = new object[] { __instance.weapon.DamagePerShot };
                        methodInfo.Invoke(__instance, parametersArray);
this is a method execute with a parameter
Type type3 = __instance.GetType();
                    FieldInfo field= type3.GetField("hitIndex", BindingFlags.NonPublic | BindingFlags.Instance);
                    field.SetValue(__instance, shotcount - 1);
setting a field
and setting a parameter is the same with paramater instead of field