How to Locate a DYNAMIC Salesforce Lightning INPUT Element with XPATH using C# in Selenium WebDriver

Question

I need to find out how to Locate a Dynamic Salesforce Lightning Input Element with XPATH using C# in Selenium WebDriver. I just can't get it to work. Below is the code I've tried followed by the HTML and Full XPATH. I get a Bad Token Error and don't know what that means.`Can someone show me a better way like Parent:Child locate? These Lightning Elements are a tough nut to crack...Thanks in Advance!

C# Selenium WebDriver Code:

//CODE FAILS! //Enter File Number/SSN/TIN ID and Click Search 
**driver.FindElement(By.XPath("//input[starts-with(@id.'input-')]")).Click();

HTML:

<input name="Participant Id" class="slds-input" id="input-32" aria-describedby="help-message-32" required="" type="text" maxlength="9" pattern="([0-9]*)$" lightning-input_input="">

  <div class="slds-form-element__control slds-grow" lightning-input_input=""><input name="Participant Id" 
  class="slds-input" id="input-32" required="" type="text" maxlength="9" pattern="([0-9]*)$" lightning- 
  input_input=""></div>
  <input name="Participant Id" class="slds-input" id="input-32" required="" type="text" maxlength="9" 
  pattern="([0-9]*)$" lightning-input_input="">

FULL XPATH: /html/body/div[4]/div[1]/div[2]/div[1]/div/div/div/div/div/div/div[2]/div/div[1]/div/div[1]/cempw-r_-participant-search/article/div[2]/lightning-input/div/input

ERROR :

{"Unable to locate an element with the xpath expression //input[starts-with(@id.'input-')] because of the following error:\\nError: Bad token: 'input-'"}

Answer 1

Try putting a "." before the double slashes, prior to "input" tag name, and use "@" before Attributes:

driver.FindElement(By.XPath(".//input[starts-with(@id.'input-')]")).Click()