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i used this link[^] to use the copytodatatable method .I am getting an error at the copytodatatable method inside the is saying that:
Extension method must be defined inside the top level static class
Posted 17-May-12 22:35pm
Updated 18-May-12 10:16am

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Solution 1

As explained here[^] the above error is generated when the class in which extension methods are defined is a nested class. So please check your class and make it top level static class.

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