How to select complete paragraph with selenium webdriver?

I want to select a whole paragraph and then the selected text of this paragraph appears in a text area. I tried many solution but it selects from middle to the end or middle to the start of the paragraph. I have this paragraph:

A paragraph is a self-contained unit of a discourse in writing dealing with a particular point or idea. A paragraph consists of one or more sentences. Though not required by the syntax of any language, paragraphs are usually an expected part of formal writing, used to organize longer prose.


Now i want to select this complete paragraph by using below code:

Actions context = new Actions(driver);
context.MoveToElement(heading).ClickAndHold(heading).MoveByOffset(170, 55).KeyUp(OpenQA.Selenium.Keys.LeftShift).Release();

But this code select only that part of the paragraph which i make italic. Please help me to select the whole paragraph.