Example of using LINQ to SQL query

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public DBDataContext dc = new DBDataContext();
//create local string variables
string username = string.Empty;
string password = string.Empty;
//LINQ query expression
IQueryable loginfo = from lg in dc.Logins
where lg.user_name == txtUserName.Text &amp;&amp; lg.pass_word == txtPassWord.Text
select lg;
foreach (Login log in loginfo)
 username = log.user_name;
 password = log.pass_word;

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