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c# - The type or namespace name 'Reporting' does not exist in the namespace 'Microsoft'

I simply get the following error:

The type or namespace name 'Reporting' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)

after adding this to my code:

protected global::Microsoft.Reporting.WebForms.ReportViewer ReportViewer1;

I've seen some solutions saying I must add some assemblies. but none of them worked. here is an example:

<add assembly="Microsoft.ReportViewer.Common, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

can anyone help me with this?

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In my case I needed to actually install Microsoft Report Viewer on the troublesome machine.

Of course, other ones are available, it can be worked out which from the Version= on the dll which one is needed. In my case I needed version 11 (the 2012 one).


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