Help with ReportViewer

Hi, i trying to use a tool called ReportViewer, and in process i have much trouble to add a dataset because the version of Visual Studio 2022 can't find a class in my project. So i make this manually, after, i try to create a sub-report and discovery that when i add a dataset manually, he cant identify the Report2 (name of subreport file). if is missing a information, pls, tell me.