Create Unity custom inspector for custom data type

Hello, Req #1: I need a custom inspector for Unity for a variable of custom data type "configurationItems". This variable is a member variable of the GameObject to which the custom inspector will be attached. Req #2: Data type definitions: public enum ConfigrationKeysEnum { Config1, Config2, Config3 } public interface IConfigurationItem { } public class ConfigurationItem<T> : IConfigurationItem /* T is bool, float or int */ { [login to view URL] name; //not needed to view string nameString; //read only T minValue; //read/write T maxValue; //read/write T currentValue; //read/write T defaultValue; //read/write int canvasId; //read only } private static Dictionary<[login to view URL], IConfigurationItem> configurationItems; public void saveFunction() {} Req #3: In the inspector, the fields should be either read only or read/write based on the comments mentioned in the definition of ConfigurationItem above. Req #4: An extra button is needed in the custom inspector to call saveFunction()