Selenium-C#- Latest Browser and V"4.0.0-beta4" or in "4.0.0-rc1" Issues

The below mentioned are the issues in the Selenium-C#-V"4.0.0-beta4" or in "4.0.0-rc1" Issues

1.  In the Selenium "4.0.0-beta4" or in "4.0.0-rc1" -C#, the 'ExpectedConditions' method implementation is not provided in the 'OpenQA.Selenium.Support.UI'

Selenium - C# -Issues in all latest browsers

1. The drag and drop functionality is not working in all latest browser
2. The "CTRL + t :: For opening a new tab" functionality achieved through the Actions class is not working
3. The "CTRL + shift + a :: For opening Add-ons tab" functionality achieved through the Actions class is not working 
4. "ALT + f + x - for closing the tab" functionality achieved through the Actions class
5. The "Click And Hold" functionality is not working