How to replace a single word from string in gridview using c#

<asp:GridView ID="GridView1" AutoGenerateColumns="false" runat="server"
            onrowdatabound="GridView1_RowDataBound">
            <Columns>

                <asp:TemplateField HeaderText="Column 1">
                    <ItemTemplate>
                        <asp:TextBox ID="txtbox" Text='<%# Eval("Name") %>' runat="server"></asp:TextBox>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

Public partial class test : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e) {

            if (Page.IsPostBack)
            { }
            else
            {
                DataTable dt = new DataTable();
                dt.Columns.Add("Name", typeof(string));
                dt.Rows.Add("Fatty acyl CoA from the cytosol reacts with carnitine in the outer mitochondrial membrane, forming fatty acyl carnitine");
                dt.Rows.Add("Fatt acyl carnitine");
                
                GridView1.DataSource = dt;
                GridView1.DataBind();
            }
        
        }

        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {  

               var txt  =  e.Row.FindControl("txtbox") as TextBox;
               txt.Text = txt.Text.Replace("acyl carnitine", "acyl-carnitine");

            }

        }

         

    }