How to count lines in a string?

Question

I am removing text from a string and what to replace each line with a blank line.

Some background: I am writing a compare function that compares two strings. Its all working fine and are displayed in there two separate web browsers. When i try scroll down on my browsers the strings are different lengths, I want to replace the text i am removeing with a blank line so that my strings are the same length.

In the code below i am looking to count how many lines aDiff.Text has

Here is my code:

public string diff_prettyHtmlShowInserts(List<Diff> diffs)     {         StringBuilder html = new StringBuilder();          foreach (Diff aDiff in diffs)         {             string text = aDiff.text.Replace("&", "&amp;").Replace("<", "&lt;")               .Replace(">", "&gt;").Replace("\n", "<br>"); //&para;             switch (aDiff.operation)             {                  case Operation.DELETE:                                                  //foreach('\n' in aDiff.text)                    // {                    //     html.Append("\n"); // Would like to replace each line with a blankline                    // }                     break;                 case Operation.EQUAL:                     html.Append("<span>").Append(text).Append("</span>");                     break;                 case Operation.INSERT:                     html.Append("<ins style=\"background:#e6ffe6;\">").Append(text)                         .Append("</ins>");                     break;             }         }         return html.ToString();     } 

Answer 1

Method 1:

int numLines = aDiff.text.Length - aDiff.text.Replace _                    (Environment.NewLine, string.Empty).Length; 

Method 2:

int numLines = aDiff.text.Split('\n').Length; 

Both will give you number of lines in text.