Fixed ArgumentOutOfRangeException in CodeCoverageControl.OpenFile (http://community.sharpdevelop.net/forums/t/12456.aspx).

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageControl.cs

@@ -240,7 +240,7 @@ namespace ICSharpCode.CodeCoverage
 				CodeCoverageSequencePoint sequencePoint = methodNode.Method.SequencePoints[0];
 				if (sequencePoint.HasDocument()) {
 					if (classNode == null) {
-						OpenFile(sequencePoint.Document, sequencePoint.Line - 1, sequencePoint.Column - 1);
+						OpenFile(sequencePoint.Document, sequencePoint.Line, sequencePoint.Column);
 					} else {
 						OpenFile(sequencePoint.Document, 1, 1);
 					}
@@ -310,8 +310,8 @@ namespace ICSharpCode.CodeCoverage
 				textEditor.Load(fileName); 
 			}
 			textEditor.ScrollToEnd();
-			textEditor.TextArea.Caret.Line = line - 1;
-			textEditor.ScrollToLine(line - 1); 
+			textEditor.TextArea.Caret.Location = new ICSharpCode.AvalonEdit.Document.TextLocation(line, column);
+			textEditor.ScrollToLine(line);
 			CodeCoverageService.ShowCodeCoverage(new AvalonEditTextEditorAdapter(textEditor), fileName);
 		}
 		

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/TextEditor.cs

@@ -1102,6 +1102,11 @@ namespace ICSharpCode.AvalonEdit
 			TextView textView = textArea.TextView;
 			TextDocument document = textView.Document;
 			if (scrollViewer != null && document != null) {
+				if (line < 1)
+					line = 1;
+				if (line > document.LineCount)
+					line = document.LineCount;
+				
 				IScrollInfo scrollInfo = textView;
 				if (!scrollInfo.CanHorizontallyScroll) {
 					// Word wrap is enabled. Ensure that we have up-to-date info about line height so that we scroll