Fix a potential null reference bug
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@ -451,6 +451,7 @@ namespace EduNetworkBuilder
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if (tvClasswork.SelectedNode == null) return;
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if (tvClasswork.SelectedNode == null) return;
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TreeNode Node = tvClasswork.SelectedNode;
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TreeNode Node = tvClasswork.SelectedNode;
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if (Node == null) return; //Break out to avoid exploding
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if (Node.Tag is SchoolworkClass)
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if (Node.Tag is SchoolworkClass)
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{
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{
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