Compile old RDLCs in VS2019

Question

Winforms
SQL Server

I have a project that I designed in VS2015 Pro.
I wanted to load it in VS2019 Pro.

EPIC FAIL.

Loaded the project into VS 2019, build failed, the MSI installer was incompatible, error, error after miserable error. Then I exited WITHOUT SAVING.

NOW when I try to edit my RDLC reports in VS2015, I have lost the Report designer, and the reports open as raw XML files.

When I execute my reports in the debugger from VS2019, I get this:

Microsoft.Reporting.WinForms.LocalProcessingException
  HResult=0x80131500
  Message=An error occurred during local report processing.
  Source=Microsoft.ReportViewer.WinForms
  StackTrace:
   at Microsoft.Reporting.WinForms.LocalReport.EnsureExecutionSession()
   at Microsoft.Reporting.WinForms.LocalReport.SetParameters(IEnumerable`1 parameters)
   at Onesource.Reports.ShippedNotInvoiced.ShippedNotInvoicedReport.SetParameters() in C:\...\Reports\ShippedNotInvoiced\ShippedNotInvoicedReport.cs:line 124

  This exception was originally thrown at this call stack:
    [External Code]

Inner Exception 1:
DefinitionInvalidException: The definition of the report '' is invalid.

Inner Exception 2:
ReportProcessingException: The definition of this report is not valid or supported by this version of Reporting Services. The report definition may have been created with a later version of Reporting Services, or contain content that is not well-formed or not valid based on Reporting Services schemas. Details: The report definition has an invalid target namespace 'http://schemas.microsoft.com/sqlserver/reporting/2016/01/reportdefinition' which cannot be upgraded.

My packages.config looks like this:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.Office.Interop.Outlook" version="15.0.4797.1003" targetFramework="net45" />
  <package id="Microsoft.ReportViewer.2015" version="12.0.2.2403" targetFramework="net45" />
  <package id="Microsoft.ReportViewer.2015.Runtime" version="12.0.2.2402" targetFramework="net45" />
  <package id="Microsoft.ReportViewer.Runtime.Common" version="12.0.2402.15" targetFramework="net45" />
  <package id="Microsoft.ReportViewer.Runtime.WinForms" version="12.0.2402.15" targetFramework="net45" />
  <package id="Microsoft.ReportViewer.VS2015.WinForms" version="12.0.2.2402" targetFramework="net45" />
  <package id="Microsoft.SqlServer.Types" version="14.0.314.76" targetFramework="net45" />
  <package id="Shared.Management.Objects.for.SQL.Server.2012.SP1" version="11.0.3000.0" targetFramework="net45" />
</packages>

Answer 1

https://www.nuget.org/packages/Microsoft.ReportingServices.ReportViewerControl.Winforms/150.1576.0?_src=template