topic If you are using the LINQ… in Product Forum https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63376#M16326 If you are using the LINQ query, then you should be refer below dll's and import the namespace: :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Xml.Linq.dll :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Core.dll :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Data.DataSetExtensions.dll Namespace: System.Linq Wed, 21 Nov 2018 13:23:00 GMT VijayDodamani 2018-11-21T13:23:00Z Using AsEnumerable() in Code Stage https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63371#M16321 Hello,   I€™m building my own code stage and I would like to use AsEnumerable method on DataTable, something like below: Dim CustomerOrders = DtWithRecords.AsEnumerable().Select(Function(row) row.Field(Of Decimal)("ORDERNO")).Distinct()   Unfortunately, I'm receiving an error: Public member "AsEnumerable" on type "DataTable" not found.   I referenced System.Data.DataSetExtensions.dll on Initialise Page.   What I'm doing wrongly here? Tue, 13 Nov 2018 13:52:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63371#M16321 Anonymous 2018-11-13T13:52:00Z Try adding namespace too https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63372#M16322 Try adding namespace too Tue, 13 Nov 2018 15:49:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63372#M16322 AndreyKudinov 2018-11-13T15:49:00Z Tried it before,… https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63373#M16323 Tried it before, unfortunately didn't solve the problem. Tue, 13 Nov 2018 18:18:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63373#M16323 Anonymous 2018-11-13T18:18:00Z It's telling you that… https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63374#M16324 It's telling you that whatever class the DtWithRecords object is does not have a AsEnumerable method Wed, 14 Nov 2018 20:18:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63374#M16324 John__Carter 2018-11-14T20:18:00Z I know what is telling… https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63375#M16325 I know what is telling. Problem is that it shouldn't be a problem as I'm using System.Data.DataSetExtensions.dll on Initialise Page, which should be enough to use AsEnumerable on DataTable (and DtWithRecords is a Data Table). Fri, 16 Nov 2018 18:28:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63375#M16325 Anonymous 2018-11-16T18:28:00Z If you are using the LINQ… https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63376#M16326 If you are using the LINQ query, then you should be refer below dll's and import the namespace: :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Xml.Linq.dll :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Core.dll :\Windows\Microsoft.NET\Framework\v4.0.30319\System.Data.DataSetExtensions.dll Namespace: System.Linq Wed, 21 Nov 2018 13:23:00 GMT https://community.blueprism.com/t5/Product-Forum/Using-AsEnumerable-in-Code-Stage/m-p/63376#M16326 VijayDodamani 2018-11-21T13:23:00Z