C#

count++;
Console.WriteLine("count = {0}", count);

0 1 1 0
      ^

(condition 1 is met)

0 1 1 0
    ^

(condition 2 is not met)
(condition 3 is met)

0 1 1 0
  ^

(condition 4 is met)

0 1 1 0
^

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("UPDATE myTable SET myColumn1='" + myNewString + "' WHERE Id=" + myId.ToString(), con))
        {
        com.ExecuteNonQuery();
        }
    }

Hello';DROP TABLE myTable;--

UPDATE myTable SET myColumn='Hello';DROP TABLE myTable;--' WHERE Id=666

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("UPDATE myTable SET myColumn1=@MYSTRING WHERE Id=@ID", con))
        {
        com.Parameters.AddWithValue("@ID", myId);
        com.Parameters.AddWithValue("@MYSTRING", myNewString);
        com.ExecuteNonQuery();
        }
    }

Object is round AND object is blue

Object is round OR object is blue

SELECT * FROM MyTable WHERE ID = 666 AND dateEntered > '2014-01-01'

SELECT * FROM MyTable WHERE MyColumn=Value

X   is saying which column of the row is to be compared
=   is saying the the left and right sides must be the same
Y   is the value to compare against the column

[name] = @P4
[id] = @P5
[salary] = @P6

protected void Session_ErrorOccurred(string id, string message, bool handled)
{
    handled = true;
    throw new SASException(id, message);
}

protected void Session_ErrorOccurred(object sender, ErrorEventArgs args)
{
    args.handled = true;
    throw new SASException(args.id, args.message);
}

Library.CallToSomething();
if(ErrorWasRaised) throw new MyException("...");

Library.CallToSomethingElse();
if(ErrorWasRaised) throw new MyException("...");

void CallErrorHandlingLibraryCode(Action code) {
 string errorId = null, errorMessage = null;
 OnErrorHandler errorLogger = (id, message) => {
  errorId = id; errorMessage = message;
  return true;
 };
 Library.OnError += errorLogger;
 try {
  code();
  if(null != errorId)
   throw new SASException(errorId, errorMessage);
 } finally {
  Library.OnError -= errorLogger;
 }
}

CallErrorHandlingLibraryCode(() => Library.CallToSomething());
CallErrorHandlingLibraryCode(() => Library.CallToSomethingElse());