variable not declared?

Hello, I've got an error and I don't know how to fix this... Looks like the variable isn't declared but I've got a warning as well wich says:

Assets/scripts 1/Character Classes/ModifiedStat.cs(20,45): warning CS0219: The variable att' is assigned but its value is never used This is my error: Assets/scripts 1/Character Classes/ModifiedStat.cs(21,52): error CS0841: A local variable att' cannot be used before it is declared

and this is my script:

 using System.Collections.Generic;
 
 public class ModifiedStat : BaseStat {
     private List<ModifyingAttribute> _mods;    //a list of Attributes that modify the stats
     public int _modValue;                    //The amount added to the baseValue
     
     public ModifiedStat() {
         _mods = new List<ModifyingAttribute>();
         _modValue = 0;
     }
     
     public void AddModifier( ModifyingAttribute mod) {
         _mods.Add(mod);
     }
     
     private void CalculateModValue() {
         _modValue = 0;
         
         if(_mods.Count > 0)
         {foreach(ModifyingAttribute att in _mods);
                 _modValue += (int)(att.attribute.AdjustedValue * att.ratio);
         }
     }
     
     public new int AdjustedBaseValue {
         get{ return _baseValue + BuffValue + _modValue; }
     }
     
     public void Update() {
         CalculateModValue();
     }
 }
 
 public struct ModifyingAttribute {
     public Attribute attribute;
     public float ratio;
 }

Thank you all for any help!