The watermark appears in the text area of the C1FilePicker control by default. The watermark can give directions or suggestions for users at run time, for example the default watermark text states "Select a file":
Notice that the text appears grayed out. When a file or multiple files are selected the file(s) will appear in this text area instead and appear a darker color to be distinguished from the watermark. If a file is selected and the files are cleared from the C1FilePicker control using the ClearSelection method, the watermark will appear again. See Clearing Selected Files for an example.
You can customize the watermark text by setting the Watermark property to the value you want to appear. For an example, see the Removing the Watermark topic. If you do not want a watermark to appear, you can set the Watermark property to a blank value (for example, a space character).