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    <p>As others have said, you need to escape values that include quotes. Here’s a little CSV reader in C♯ that supports quoted values, including embedded quotes and carriage returns.</p> <p>By the way, this is unit-tested code. I’m posting it now because this question seems to come up a lot and others may not want an entire library when simple CSV support will do.</p> <p>You can use it as follows:</p> <pre class="lang-cs prettyprint-override"><code>using System; public class test { public static void Main() { using ( CsvReader reader = new CsvReader( "data.csv" ) ) { foreach( string[] values in reader.RowEnumerator ) { Console.WriteLine( "Row {0} has {1} values.", reader.RowIndex, values.Length ); } } Console.ReadLine(); } } </code></pre> <p>Here are the classes. Note that you can use the <code>Csv.Escape</code> function to write valid CSV as well.</p> <pre class="lang-cs prettyprint-override"><code>using System.IO; using System.Text.RegularExpressions; public sealed class CsvReader : System.IDisposable { public CsvReader( string fileName ) : this( new FileStream( fileName, FileMode.Open, FileAccess.Read ) ) { } public CsvReader( Stream stream ) { __reader = new StreamReader( stream ); } public System.Collections.IEnumerable RowEnumerator { get { if ( null == __reader ) throw new System.ApplicationException( "I can't start reading without CSV input." ); __rowno = 0; string sLine; string sNextLine; while ( null != ( sLine = __reader.ReadLine() ) ) { while ( rexRunOnLine.IsMatch( sLine ) &amp;&amp; null != ( sNextLine = __reader.ReadLine() ) ) sLine += "\n" + sNextLine; __rowno++; string[] values = rexCsvSplitter.Split( sLine ); for ( int i = 0; i &lt; values.Length; i++ ) values[i] = Csv.Unescape( values[i] ); yield return values; } __reader.Close(); } } public long RowIndex { get { return __rowno; } } public void Dispose() { if ( null != __reader ) __reader.Dispose(); } //============================================ private long __rowno = 0; private TextReader __reader; private static Regex rexCsvSplitter = new Regex( @",(?=(?:[^""]*""[^""]*"")*(?![^""]*""))" ); private static Regex rexRunOnLine = new Regex( @"^[^""]*(?:""[^""]*""[^""]*)*""[^""]*$" ); } public static class Csv { public static string Escape( string s ) { if ( s.Contains( QUOTE ) ) s = s.Replace( QUOTE, ESCAPED_QUOTE ); if ( s.IndexOfAny( CHARACTERS_THAT_MUST_BE_QUOTED ) &gt; -1 ) s = QUOTE + s + QUOTE; return s; } public static string Unescape( string s ) { if ( s.StartsWith( QUOTE ) &amp;&amp; s.EndsWith( QUOTE ) ) { s = s.Substring( 1, s.Length - 2 ); if ( s.Contains( ESCAPED_QUOTE ) ) s = s.Replace( ESCAPED_QUOTE, QUOTE ); } return s; } private const string QUOTE = "\""; private const string ESCAPED_QUOTE = "\"\""; private static char[] CHARACTERS_THAT_MUST_BE_QUOTED = { ',', '"', '\n' }; } </code></pre>
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    1. COYou may also need to translate \r\n for windows compliance, depending on your application.
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