Index: XmlTextWriter.cs
===================================================================
RCS file: /cvsroot/dotgnu-pnet/pnetlib/System.Xml/XmlTextWriter.cs,v
retrieving revision 1.8
diff -u -r1.8 XmlTextWriter.cs
--- XmlTextWriter.cs	13 Dec 2002 03:45:07 -0000	1.8
+++ XmlTextWriter.cs	28 Dec 2002 15:37:56 -0000
@@ -776,10 +776,31 @@
 				writer.Write(name);
 			}
 
-	// Write a processing instruction.
+	// Write a processing instruction. <?name text?>
 	public override void WriteProcessingInstruction(String name, String text)
-			{
-				// TODO
+			{						
+
+				if((writeState == System.Xml.WriteState.Start) || (name == null)) 
+				{
+					throw new ArgumentException
+						(S._("Xml_ArgumentException"), "name");
+					
+				}
+				if(writeState == System.Xml.WriteState.Closed)	
+				{
+
+					throw new InvalidOperationException
+						(S._("Xml_InvalidOperation"));
+				}
+
+				Sync(WriteStateFlag.PrologFlag); 
+
+				if (text != null) 
+				{
+					writer.WriteLine("<?{0} {1}?>",name, text);
+				} else {
+					writer.WriteLine("<?{0}?>",name);
+				}
 			}
 
 	// Write a qualified name.