C# How to convert Enum Value to Int

I have got an Enum List

public enum SkillName {
    Mele_Offence,
    Mele_Defence

}

Then my skills are setted up and modified on Player class

private void SetupSkillModifires () {
        // mele Offence
        GetSkill((int)SkillName.Mele_Offence).AddModifire(new ModifyingAttribute(GetPrimaryAttribute((int)AttributeName.Strength), 2));
        GetSkill((int)SkillName.Mele_Offence).AddModifire(new ModifyingAttribute(GetPrimaryAttribute((int)AttributeName.Agility), 1));
        //mele Deffence 

        GetSkill((int)SkillName.Mele_Defence).AddModifire(new ModifyingAttribute(GetPrimaryAttribute((int)AttributeName.Agility), 1));
        GetSkill((int)SkillName.Mele_Defence).AddModifire(new ModifyingAttribute(GetPrimaryAttribute((int)AttributeName.Vitality), 2));
        //Magic Offence

    }

Then I have converted it to string and displayed it in scene.

private void DisplayAttributes() {

        for(int cnt = 0; cnt < Enum.GetValues(typeof(AttributeName)).Length; cnt++) {
            GUI.Label (new Rect (130, 60 + (cnt * 20), 100, 20), ((AttributeName)cnt).ToString());
            GUI.Label (new Rect (300, 60 + (cnt * 20), 30, 25), _toon.GetPrimaryAttribute(cnt).AdjustedBaseValue.ToString());
            if (GUI.Button (new Rect (265, 60 + (cnt * 20), 20, 20), "-")) {
                if (_toon.GetPrimaryAttribute(cnt).BaseValue > MIN_STARTING_ATTRIBUTE_VALUE) {
                    _toon.GetPrimaryAttribute (cnt).BaseValue--;
                    pointsLeft++;
                    _toon.StatUpdate ();
                }

How to assign theese skills to Player attack value?
I have this error.
error CS0029: Cannot implicitly convert type Skil to int?