C#

I want to get the control for passing the ticket number in the search bar and update the work notes field and need to change the state field to resolved and click on the update button in servicenow. I have tried but it shows (no such element found exception). kindly help me in this case. I have attached the sample code that I have tried.I have used seleniumc#. I have tried many ways but still getting no such element found exception. kindly some one help me in this case.I want in c#.

Below one is the sample code which i have tried

IWebElement elem = driver.FindElement(By.Id("sysparm_search")); 
((IJavaScriptExecutor)driver).ExecuteScript("arguments[0].scrollIntoView();", elem); 
elem.SendKeys("INC0008111");
elem.SendKeys(Keys.Enter); 
WebDriverWait wait2 = new WebDriverWait(driver,TimeSpan.FromSeconds(20)); 
wait.Until(ExpectedConditions.ElementExists(By.Id("activity-stream-textarea"))) 
wait2.SendKeys("closing the request"); 
SelectElement se = new 
SelectElement(driver.FindElement(By.Name("incident.state"))); 
se.SelectByIndex(3); IWebElement ele4 = 
driver.FindElement(By.Id("resolve_incident")); ele4.Click();

private string _Yoy = @"IF(AND(ISNUMBER(C#),P#>0,NOT(ISERROR(C#/P#))),C#/P#-1,"""")";
             public  string YoY
             {
                 get { return _Yoy; }
                 set { _Yoy = value; }
             }
        
             private void button1_Click(object sender, EventArgs e)
             {
                string strBMFormula = YoY.Replace("P#", "2005.13").Replace("C#", "7777.10");
             }

@"IF(AND(ISNUMBER(C#),P#>0,NOT(ISERROR(C#/P#))),C#/P#-1,"""")";

private void button1_Click(object sender, EventArgs e)
 {
     string strBMFormula = Replacement("A10", "Z210");
 }
    
 private string Replacement(string value1, string value2)
 {
     return @"IF(AND(ISNUMBER({value1}),{value2}>0,NOT(ISERROR({value1}/{value2}))),{value1}/{value2}-1,"""")";
 }