Specific dimension display in Ax 2012

private Description DimensionbyDept()
{
    DimensionAttributeValueSetStorage dimStorage;
    Counter i;
    str 20 dim;
    int64 n;

    dimStorage = DimensionAttributeValueSetStorage::find("DefaultDimension");

        for (i=1 ; i<= dimStorage.elements() ; i++)
    {
        if(DimensionAttribute::find(dimStorage.getAttributeByIndex(i)).Name == 'Department')
        {
            n= dimStorage.getValueByIndex(i);
        }
        dim = DimensionFinancialTag::find(n).Description;

    }
    return dim;