Get match string from string statement c# :    

     string l_path = "C:\\Winodws\\System32\calc.exe"
        string findString = "C:\\Windows";
          if (l_path.Contains(findString ))//C:\\Winodws\\System32\calc.exe
          {
                 string l_EnvironmentVariable = l_path.Replace(findString , "WinDir");
                            
          }

i want to get exact match from string statement.But when i check contains method its checking for any character match..