Error after Unity scene load

Hi! First post as I just started with Unity. This message is on the console every time I start up Unity:

Assets\PostProcessing\Editor\PropertyDrawers\MinDrawer.cs(6,34): error CS0104: ‘MinAttribute’ is an ambiguous reference between ‘UnityEngine.PostProcessing.MinAttribute’ and ‘UnityEngine.MinAttribute’

Just started learning C# so I am baffled by this message.

Tried:
Reloaded Unity 2018.3.7 Personal
Upgraded Unity 2018.3.7 Personal to 2018.3.11f1 Personal
Updated Windows 7-64 bit to current updates
Many restarts/power on-offs over several days
Created new scene (no error)
Microsoft C# web site and manual for more error info

Program MiniDrawer Code:

using UnityEngine;
using UnityEngine.PostProcessing;
namespace UnityEditor.PostProcessing
{

[CustomPropertyDrawer(typeof(MinAttribute))]
sealed class MinDrawer : PropertyDrawer

{

public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
MinAttribute attribute = (MinAttribute)base.attribute;

if (property.propertyType == SerializedPropertyType.Integer)
{

int v = EditorGUI.IntField(position, label, property.intValue);

property.intValue = (int)Mathf.Max(v, attribute.min);

}

else if (property.propertyType == SerializedPropertyType.Float)
{

float v = EditorGUI.FloatField(position, label, property.floatValue);

property.floatValue = Mathf.Max(v, attribute.min);

}

else

{

EditorGUI.LabelField(position, label.text, “Use Min with float or int.”);

}

}

}
}

Can anyone help?

Thanks

Keith

Seems like you just need to fully qualify MinAttribute. Where ever you use it, just use UnityEngine.PostProcessing.MinAttribute (or the other one)

Thanks!