HTML:
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtLong" runat="server" /><br />
<asp:Label ID="lblShortForm" Text="" runat="server" /><br />
<asp:Button Text="LongForm to ShortForm" OnClick="LongFormtoShortForm" runat="server" />
</div>
</form>
C#:
protected void LongFormtoShortForm(object sender, EventArgs e)
{
string longform = txtLong.Text.Trim();
string a = longform.ElementAt(0).ToString();
int first_space = longform.IndexOf(" ");
string b = longform.ElementAt(first_space + 1).ToString();
int last_space = longform.LastIndexOf(" ") + 1;
int length = longform.Length;
for (int i = last_space; i < longform.Length; i++)
{
lblShortForm.Text += longform.ElementAt(i).ToString();
}
string c = lblShortForm.Text;
lblShortForm.Text = a + "." + b + "." + c;
}