Crystal reports error in SetDataSource

Question

I am having trouble in VS 2010 sap crystalreports, using c# to make a windows application.

I get the following error with the following code:

 CrystalReport1 cr1 = new CrystalReport1();
 cr1.SetDataSource(dt1); //Error 

Could not load file or assembly 'file:///C:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win64_x64\dotnet1\crdb_adoplus.dll' or one of its dependencies. The system cannot find the file specified.

Answer 1

Try using this solution by adding the useLegacyV2RuntimeActivationPolicy attribute to your .config file

<startup useLegacyV2RuntimeActivationPolicy="true">

Answer 2

 <startup useLegacyV2RuntimeActivationPolicy="true" >
    <supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0" />
 </startup>

Add this code in app.config.