/// <summary>
        /// Button to search for given terms
        /// </summary>
        private void btnSearch_Click(object sender, EventArgs e)
        {
            // Declare and initialize object
            Inventory searchResults = new Inventory();

            // Declare and initilize enum search type
            Inventory.SearchType searchType = Inventory.SearchType.Name;

            // Check each radio button to decide what to do
            if (rbByName.Checked == true)
            {
                // Search by name...
                searchType = Inventory.SearchType.Name;
            }
            else if (rbByDescription.Checked == true)
            {
                // Search by Description
                searchType = Inventory.SearchType.Description;
            }
            else if (rbByDepartment.Checked == true)
            {
                // Search by Department
                searchType = Inventory.SearchType.Department;
            }
            else if (rbBySku.Checked == true)
            {
                // Search by SKU
                long.TryParse(txtSearch.Text, out long sku);

                try
                {
                    // Fill the list with the results
                    FillList(inventory.FindItemBySKU(sku));
                } catch
                {
                    // Let the user know the SKU was not found
                    MessageBox.Show(this, "SKU not found!");
                }
                return;
            }

            // Fill the list with the results
            FillList(inventory.FindItemsBySearchType(txtSearch.Text, searchType));
        }