C#无法将顶级控件添加到控件

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/thanks_hck/article/details/81559582

_frmStructuralIndicatorsMain.TopLevel = false;
 _frmStructuralIndicatorsMain.Parent = this.pnlEmptyDocumentInfo;
_frmStructuralIndicatorsMain.Show();