c# - Secondary Monitor shows part of Primary Monitor -


i have created win app, uses secondary monitor show images. have used following code detect , set location of secondary monitor(which extended monitor of primary monitor).

public void secondarydisplay() {      frmsecondarydisplay secdis = new frmsecondarydisplay();     screen[] screens = screen.allscreens;     secdis.mybase = this;     this.mysecscreen = secdis;     secdis.show();     setformlocation(secdis, screens[1]);  }  private void setformlocation(form form, screen screen) {     rectangle bounds = screen.bounds;     form.setbounds(bounds.x, bounds.y, bounds.width, bounds.height);     form.startposition = formstartposition.manual;  }

problem getting thin 6mm white line on left corner of secondary display. nothing extension of primary display. how make disapper? on moving cursor secondary monitor , click on screen of secondary monitor white line disappears. , on moving cursor primary monitor , click on makes white line appear on secondary monitor. kindly me how can resolve issue. looks ugly in secondary mopnitor.

always prepared window properties before show()

public void secondarydisplay() {      if (screen.allscreens.count() == 1)     {         return; // no second display     }      var secdis = new frmsecondarydisplay();      // shall use secdis.show(this) build relation of forms.      // when "this" closes, second display form closes.     secdis.mybase = this;      this.mysecscreen = secdis;       // setup windows position before show()     secdis.startposition = formstartposition.manual;     secdis.location = screen.allscreens[1].workingarea.location;     secdis.topmost = true;     secdis.formborderstyle = formborderstyle.none;     secdis.windowstate = formwindowstate.maximized;      secdis.show(this); // see comment above }

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