how do i write query that contains '%' character in config?

static void Main()   
{   
       string cstr = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;";   
       using ( SqlConnection conn = new SqlConnection( cstr ) )   
       {
             conn.Open();     
             string selstr = "select FirstName from Employee where lastname = @name";
             SqlCommand cmd = new SqlCommand( selstr, conn ); 
             SqlParameter name = cmd.Parameters.Add( "@name", SqlDbType.NVarChar, 15 );    
             name.Value = "Tang";    
             SqlDataReader rdr = cmd.ExecuteReader();     
             if ( rdr.Read() )    
             {     
                   Console.WriteLine(rdr.GetString( 0 ) );    
             }    
             else    
             {     
                   Console.WriteLine("not available yet" );    
             }   
        }   
}