Method opens a standard file-selection dialog box if it is invoked on a text field for which the fileSelect flag is true. The path entered through the dialog box is automatically assigned as the value of the text field.
Method throws an exception if it is invoked on a text field in which the fileSelect flag is false.
Target Platforms: .NET9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5