can you help me please :

Use FindControl If the Button is within another control.

i want to hide this button

<HeaderTemplate>
<asp:Label Font-Size="15px" runat="server" style="color: #3366FF"><u>Action</u></asp:Label>
<asp:LinkButton runat="server" ID="bt1" ValidationGroup="breath" CausesValidation="true" CommandName="addnew"  ToolTip="addnew" Text="<span class='table-icons' style='font-size:18pt;'><i class='far fa-save'></i></span>"></asp:LinkButton>
</HeaderTemplate>

when i click to this link button

<asp:LinkButton runat="server" CommandName="edit" ToolTip="edit" Text="<span class='table-icons'><i class='fas fa-edit'></i></span>" style="width:25px;margin-right:2px;vertical-align:central;"></asp:LinkButton>

and this is my function "onrowediting" in other form 

  protected void GridView_breath_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView_breath.EditIndex = e.NewEditIndex;
            PARAM_BREADTH_OF_RESPONSIBILITY_DAO breath = new PARAM_BREADTH_OF_RESPONSIBILITY_DAO(this._sSqlConnectionString);
            display_breath();
            breath.edit(GridView_breath);
            display_breath_form();
        }