Retrieving Text between Text in Selenium C#

Question

I am facing problem in retrieving Subject title of a mail from Unread mails using Selenium webdriver-C#.

Here\'s the HTML code :

Answer 1

Probably too late but could be helpful for someone.

        IWebElement spanText= driver.FindElement(By.XPath("//span[contains(text(), 'TEXT TO LOOK FOR')]"));
        spanText.Click();


        IWebElement spanParent= driver.FindElement(By.XPath("//span[contains(text(), 'TEXT TO LOOK FOR')]/ancestor::li"));
        spanParent.FindElement(By.XPath(".//a[contains(text(), 'SIBLING LINK TEXT')]")).Click();

bonus content here to look for siblings of this text once the span element is found, look for siblings by starting from parent. I am looking for an anchor link here. The dot at the start of XPath means you start looking from the element spanParent

 TEXT TO LOOK FOR 
SIBLING LINK TEXT