How to check whether a character is present in the value of given XPath of XML file?

Introduction
I have developed the method which will give you true as a result, if expected character is present in the XPath of XML file. If that character is not present in xpath of xml file then it will give false as a result.
User has to give parameters as xpathvalue , xml file path , expected character in the method.
Description
Create a class library in which put this code snippet and call whenever it is required.

public bool IsCharacterPresent(string xpathvalue, string user_defined_xml_file , string expected_Character)
        {
            bool result_value = false;            
            try
            {                
                XmlDocument user_defined_xml_document = new XmlDocument();
                user_defined_xml_document.Load(user_defined_xml_file);
                XmlNodeList mynodeValueList = user_defined_xml_document.SelectNodes(xpathvalue);
                foreach (XmlNode mynodeValue in mynodeValueList)
                {

                    if (mynodeValue.InnerText.Contains(expected_Character))
                   
                    {
                        result_value = true;                        
                        return result_value;
                    }
                    else
                    {
                        result_value = false;
                        
                    }                   
                }             
               
            }
            catch (Exception)
            {
                result_value = false;               
            }
            
            return result_value;
        }