The C1RdlReport component, a component that represents an RDL (Report Definition Language) report defined using the 2008 version of the RDL specification. The C1RdlReport component is similar to the C1Report component with the addition of RDL support. The C1RdlReport component is located in the C1.C1Report.4.dll assembly.
RDL import in C1PrintDocument (provided by ImportRdl and FromRdl methods) is now obsolete. C1RdlReport should be used instead.
The C1.C1Report.4 assembly uses the System.Windows.Forms.DataVisualization.dll assembly that is only included in .NET Framework 3.5 and later. The assembly is installed on your system with when you install Reports for WinForms. It MUST BE INCLUDED with other ComponentOne Reports assemblies when you deploy your application that uses Reports for WinForms to other systems.
Also, if you update the Reports for WinForms DLLs manually, you MUST put DataVisualization where those assemblies are, and make sure that your project references it. This does not apply to .NET 4.0 users as DataVisualization is already included in the Framework.