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There is already an open DataReader associated with this Command which must be closed first

ayi

<t>There is already an open DataReader associated with this Command which must be closed first</t>

ayi

<t>This can happen if you execute a query while iterating over the results from another query. It is not clear from your example where this happens because the example is not complete.<br/>
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One thing that can cause this is lazy loading triggered when iterating over the results of some query.<br/>
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This can be easily solved by allowing MARS in your connection string. Add MultipleActiveResultSets=true to the provider part of your connection string (where Data Source, Initial Catalog, etc. are specified).</t>