Connection string syntax in ASP.NET

For Windows Authenication:

   <ConnectionStrings>
     <Add Name="ConnectionStringName"
ConnectionString="Server=localhost;Database=dbname;Trusted_Connection=True;"
ProviderName="System.Data.SqlClient"/>
         </ConnectionStrings>

For SQL Server Authenication:
    <ConnectionStrings>
<Add Name="ConnectionStringName
"ConnectionString="Server=localhost or IP Adress;
Database=dbname;uid=sql server username;
Pwd=sql server user password"
Provider Name="System.Data.SqlClient"/>
</ConnectionStrings>