Getting error on xaml binding code for BooleanToVisibilityConverter in MVVM

Getting error on xaml binding code for BooleanToVisibilityConverter in MVVM

References

Reference NO 1

http://stackoverflow.com/questions/15198236/getting-error-on-xaml-binding-code-for-booleantovisibilityconverter-in-mvvm

Reference NO 2

http://stackoverflow.com/questions/11668166/mvvm-light-universalconverter-bool-to-visibility

Reference NO 3

http://www.rhyous.com/2011/02/22/binding-visibility-to-a-bool-value-in-wpf/

Reference NO 4

http://social.msdn.microsoft.com/Forums/silverlight/en-US/c461454a-cfb4-4c67-b5c0-f0654569d432/action?threadDisplayName=hide-datagrid-in-multiple-module-mvvm-application-when-there-is-no-data-to-databind

Reference NO 5

http://bembengarifin.wordpress.com/2009/08/12/setting-visibility-of-wpf-control-through-binding/

Reference NO 6

http://iimaginec.wordpress.com/2011/07/25/binding-wpf-toolkit%E2%80%99s-datagridcolumn-to-a-viewmodel-datacontext-propogation-for-datagrid-columns-the-mvvm-way-to-interact-with-datagridcolumn/

Reference NO 7

http://www.eidias.com/Blog/2012/7/2/simple-validation-in-wpf-mvvm-using-idataerrorinfo

Reference NO 8

http://wpftutorial.net/DataBindingOverview.html