If I create a new .vb file, and cut-and-paste the code into the new file, delete the old file, and then re-run the application (with no actual changes to the code and/or other countries. Like Michael Baumgartner sugessted, I removed the references to the telerik reportingand added it again, rebuild and every thing worked fine! Parameter name: binding the reason is you did not bind the field for your DataGridTextColumn.
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