查找WinForm中已打开的窗体

WinForm中有哪些窗体已经被打开 ，可以通过Application.OpenForms来判断

 

            foreach (Form form in Application.OpenForms)
            ...{
                switch(form.Text)
                ...{
                    case "与A联系":
                        MessageBox.Show("与A联系");
                        break;
                    case "与B联系":
                        MessageBox.Show("与B联系");
                        break;
                    case "与C联系":
                        MessageBox.Show("与C联系");
                        break;
 
                }
            }