I was very hopeful that since SQL Server 2012 SQLCLR supports .NET 4.0 that SQL Server Reporting Services (SSRS) 2012 would support .NET 4.0 custom code assemblies. When attemp
I might be wrong and there might be more differences but having compared reports downloaded from reporting services and "identical" ones made in Visual Studio using .Net framework 4.0+ I think the only difference is that puts a ReportParametersLayout section in the xml. If you manually remove this from the xml version of the report file then upload hopefully it will work for you