Capture screenshot then export to specific folder

Unity Engine
1

I want to capture my game with

if(Input.GetKey("c"))
{
             Application.CaptureScreenshot("Screenshot.png");
}

then export that image to folder name User Profile/Screenshot in My Documents

And I also want to make flash effect when taking a screenshot

2

You have to supply a path, if not it probably saves in your Assets folder.

For example

Application.CaptureScreenshot(@"Assets\Screenshots\Screenshot.png");