unknow namespace in Crystal Reports in C# winform

Question

I create Crystal report in C# winform. but in report.cs, get error from namespace:

****using CrystalDecisions.Shared;**
    **using CrystalDecisions.ReportSource;**
    **using CrystalDecisions.CrystalReports.Engine;****


    public class rptReport : **ReportClass** {

        public rptReport() {
        }

I added emergency dll for this namespace, but it get error.

Answer 1

似乎您没有安装Crystal运行时，或者尚未将引用添加到项目中。