C#

Managed Debugging Assistant 'ContextSwitchDeadlock' has detected a problem in 'D:\Project1\Project1\bin\Debug\Project1.vshost.exe'.<br />
Additional Information: The CLR has been unable to transition from COM context 0x1b1c30 to COM context 0x1b1da0 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.

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public class TiffDocument : PrintDocument<br />
{<br />
	private string _Tiff;<br />
	private int _PageNumber=0;<br />
	private int _NumberOfPages=0;<br />
	//private int offset;<br />
<br />
	public string Tif<br />
	{<br />
		get { return _Tiff; }<br />
		set { _Tiff = value; }<br />
	}<br />
<br />
	public int PageNumber<br />
	{<br />
		get { return _PageNumber; }<br />
		set {_PageNumber = value;}<br />
	}<br />
<br />
	public int NumberOfPages<br />
	{<br />
		get { return _NumberOfPages; }<br />
		set { _NumberOfPages = value; }<br />
	}<br />
<br />
	public TiffDocument(string tif)<br />
	{<br />
		this._Tiff = tif;<br />
		if(File.Exists(tif))<br />
		{<br />
			Image i = Image.FromFile(tif);<br />
			FrameDimension myFrame = new FrameDimension(i.FrameDimensionsList[0]);<br />
			_NumberOfPages = i.GetFrameCount(myFrame);<br />
		}<br />
	}<br />
}<br />
private void doc_PrintTiff(object sender, PrintPageEventArgs e)<br />
{<br />
	TiffDocument doc = (TiffDocument)sender;<br />
	using(Image i = Image.FromFile(doc.Tif))<br />
	{<br />
		e.Graphics.DrawImageUnscaled(i,0,0);<br />
		doc.PageNumber++;<br />
		if (doc.PageNumber  < doc.NumberOfPages)<br />
		{<br />
			// There is still at least one more page.<br />
			// Signal this event to fire again.<br />
			e.HasMorePages = true;<br />
		}<br />
		else<br />
		{<br />
			// Printing is complete.<br />
			e.HasMorePages=false;<br />
		}<br />
<br />
	}<br />
}<br />
<br />
private void button1_Click(object sender, System.EventArgs e)<br />
{<br />
	PrintDocument doc = new TiffDocument(@"C:\test.tif");<br />
	doc.PrintPage +=new PrintPageEventHandler(doc_PrintTiff);<br />
	printDialog1.Document= doc;<br />
	doc.Print();<br />
}<br />