Debug the queries running through your LINQ to SQL DataContext

DebugTextWriter.cs

public class DebugTextWriter : System.IO.TextWriter
{
    public override void Write(char[] buffer, int index, int count)
    {
        //output queries to "Output" window in visual studio
        System.Diagnostics.Debug.Write(new String(buffer, index, count), "DBDebug");
    }

    public override void Write(string value)
    {
        //output queries to "Output" window in visual studio
        System.Diagnostics.Debug.Write(value, "DBDebug");
    }

    public override Encoding Encoding
    {
        get { return System.Text.Encoding.Default; }
    }
}

RepositoryClass.cs

public class RepositoryClass
{
    public DatabaseDataContext DataContext { get; private set; }

    public RepositoryClass(string connectionString)
    {
        DataContext = DataContext ?? new DatabaseDataContext(connectionString);
        DataContext.Log = new DebugTextWriter();
    }
}