Converts the formula to a string representation, similar to the string with which it was created. This uses the
CellReferenceMode with which the formula was created to create cell reference strings.
public override string ToString()
Return Value
The string representing the formula.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+
