LabelName.Text = StringName;

Hi,You gave one syntax know,that is not working, Again I have some error...So,I discribed my problem here again ....
In that function I return one string value,I want to display the string value in another project by calling the dll of this.How can I display..?
Could you tell the code is correct or not for creating the db connection ?

publicstring FuncAuthentication(string txtusername)
{
string conn ="server=IDC-DEVELOPMENT ;uid=sa;pwd=password;database=SCBNotis";
string comm = "Select ADMINUSERID from ADMIN where ADMINUSERID='admin'";
SqlDataAdapter da =new SqlDataAdapter(comm,conn);
DataSet ds = new DataSet();
da.Fill(ds,"ADMIN");
DataTable dt = ds.Tables[0];
DataView dv;
dv = ds.Tables[0].DefaultView;
foreach(DataRow dr in dt.Rows)
{
txtusername=(dr [ "ADMINUSERID" ].ToString ( ));
}
return txtusername.ToString();
}

here, let me clean up your code so that it more cleanly does what you have it doing now

Hey,I want to get from the db not direct return.Hope you will have the ans...

you're missing the point, which is that you're sql query isn't going to work.
It is always going to return either null or "admin"