How to use custom font family in ASP.Net website

Here I have created sample that will help you out.

HTML

<div>
    <asp:Label ID="lblMessage" runat="server" Text="AspSnippets.com" />
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    PrivateFontCollection pfc = new PrivateFontCollection();
    pfc.AddFontFile(@"C:\Users\shashikant\Desktop\ALGER.ttf");
    lblMessage.Font.Name = pfc.Families[0].Name;
}

VB

Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
    Dim pfc As New PrivateFontCollection()
    pfc.AddFontFile("C:\Users\shashikant\Desktop\ALGER.ttf")
    lblMessage.Font.Name = pfc.Families(0).Name
End Sub

Output

AspSnippets.com

I would suggest you to create Folder (i.e. Fonts) in you project root directory and paste font (i.e. DroidKufi-Bold.ttf) in that folder. And refer below code.

pfc.AddFontFile(Server.MapPath("Fonts\DroidKufi-Bold.ttf"))

I hope this will help you out. If any error occurs share error description