The best overloaded method match for 'System.Data.DataRowCollection.Remove(System.Data.DataRow)' has some invalid arguments

For your understanding purpose i have shown here 3 ways to delete the GridView Row.

Namespace

using System.Data;

1) Using OnRowDeleting

HTML

Delete Row using OnRowDeleting
<asp:GridView ID="GridView2" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    OnRowDeleting="GridView1_RowDeleting" runat="server" AutoGenerateColumns="false"
    AutoGenerateDeleteButton="true">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
    </Columns>
</asp:GridView>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                    new DataColumn("Name", typeof(string)),
                    new DataColumn("Country",typeof(string)) });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");          
        this.GridView2.DataSource = dt;
        this.GridView2.DataBind();          
        ViewState["UsingRowDeleting"] = dt;           
    }
}
   
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    int index = e.RowIndex;
    DataTable dt = (DataTable)ViewState["UsingRowDeleting"];
    dt.Rows.RemoveAt(index);
    this.GridView2.DataSource = dt;
    this.GridView2.DataBind();
}

2) Using LinkButton OnClick Event

HTML

Delete Row using LinkButton OnClick event
<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID="LinkButton1" Text="Delete" OnClick="Delete" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                    new DataColumn("Name", typeof(string)),
                    new DataColumn("Country",typeof(string)) });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");
        this.GridView1.DataSource = dt;
        this.GridView1.DataBind();
            
        ViewState["UsingRowDeleting"] = dt;
        ViewState["UsingLinkButtonOnClick"] = dt;
        ViewState["UsingSelectedRow"] = dt;
    }
}
protected void Delete(object sender, EventArgs e)
{
    int index = Convert.ToInt32(((sender as LinkButton).NamingContainer as GridViewRow).RowIndex);
    DataTable dt = (DataTable)ViewState["UsingLinkButtonOnClick"];
    dt.Rows.RemoveAt(index);
    this.GridView1.DataSource = dt;
    this.GridView1.DataBind();
}  

3) Using OnSelectedIndexChanged

HTML

Delete Row using OnSelectedIndexChanged
<asp:GridView ID="GridView3" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    runat="server" AutoGenerateSelectButton="true" AutoGenerateColumns="false" OnSelectedIndexChanged="GridView3_OnSelectedIndexChanged">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
    </Columns>
</asp:GridView>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                    new DataColumn("Name", typeof(string)),
                    new DataColumn("Country",typeof(string)) });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");
           
        this.GridView3.DataSource = dt;
        this.GridView3.DataBind();
        ViewState["UsingRowDeleting"] = dt;
        ViewState["UsingLinkButtonOnClick"] = dt;
        ViewState["UsingSelectedRow"] = dt;
    }
}

protected void GridView3_OnSelectedIndexChanged(object sender, EventArgs e)
{
    int index = this.GridView3.SelectedRow.RowIndex;
    DataTable dt = (DataTable)ViewState["UsingSelectedRow"];
    dt.Rows.RemoveAt(index);
    this.GridView3.DataSource = dt;
    this.GridView3.DataBind();
}