UFT Pro (LeanFT) .NET SDK Reference, Version 14.03
ButtonDescription Constructor
Example 
Initializes a new instance of the ButtonDescription class.
Syntax
public ButtonDescription()
Example
// Describe a button.
var button = app.Describe<IButton>(new ButtonDescription
{
    ClassName = "Button",
    MobileCenterIndex = 18,
});

// tap the button
button.Tap();