private void MyPrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
int topMargin = printDocument1.DefaultPageSettings.Margins.Top;
int leftMargin = printDocument1.DefaultPageSettings.Margins.Left;
float linesPerPage = 0;
float verticalPosition = 0;
float horizontalPosition = leftMargin;
string textLine = null;
int currentLine = 0;
linesPerPage = 66;
 
while (currentLine < linesPerPage)
{
textLine = (aqui va tu fuente de lineas de texto de tu documento, una coleccion o un stream o q se yo pero q contenga todas las lineas de texto)
if(textLine == null)
{
break;
}
 
verticalPosition = topMargin + currentLine * myFont.GetHeight(e.Graphics);
 
e.Graphics.DrawString(textLine, myFont, myBrush, horizontalPosition, verticalPosition);
currentLine += 1;
}
 
if (textLine != null)
{
e.HasMorePages = true;
}
else
{
e.HasMorePages = false;
}
}