compress javascript code using .net

/// <summary>
        /// Strips the whitespace from any .js file.
        /// </summary>
        private static string StripWhitespace(string content)
        {
            string[] lines = content.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
            StringBuilder emptyLines = new StringBuilder();
            foreach (string line in lines)
            {
                string s = line.Trim();
                if (s.Length > 0 && !s.StartsWith("//"))
                    emptyLines.AppendLine(s.Trim());
            }
            content = emptyLines.ToString();
            // remove C styles comments
            content = Regex.Replace(content, "/\\*.*?\\*/", String.Empty, RegexOptions.Compiled | RegexOptions.Singleline);
            //// trim left
            content = Regex.Replace(content, "^\\s*", String.Empty, RegexOptions.Compiled | RegexOptions.Multiline);
            //// trim right
            content = Regex.Replace(content, "\\s*[\\r\\n]", "\r\n", RegexOptions.Compiled | RegexOptions.ECMAScript);
            // remove whitespace beside of left curly braced
            content = Regex.Replace(content, "\\s*{\\s*", "{", RegexOptions.Compiled | RegexOptions.ECMAScript);
            // remove whitespace beside of coma
            content = Regex.Replace(content, "\\s*,\\s*", ",", RegexOptions.Compiled | RegexOptions.ECMAScript);
            // remove whitespace beside of semicolon
            content = Regex.Replace(content, "\\s*;\\s*", ";", RegexOptions.Compiled | RegexOptions.ECMAScript);
            // remove newline after keywords
            content = Regex.Replace(content, "\\r\\n(?<=\\b(abstract|boolean|break|byte|case|catch|char|class|const|continue|default|delete|do|double|else|extends|false|
final|finally|float|for|function|goto|if|implements|import|in|instanceof|int|interface|long|native|new|null|package|
private|protected|public|return|short|static|super|switch|synchronized|this|throw|throws|transient|true|try|typeof|
var|void|while|with)\\r\\n)", " ", RegexOptions.Compiled | RegexOptions.ECMAScript);
            content = Regex.Replace(content, @"[\n\r]+\s*", string.Empty); // space
            return content;
        }

Public Function StripWhitespace(ByVal content As String) As String
        Dim lines() = content.Split(New String() {Environment.NewLine}, StringSplitOptions.RemoveEmptyEntries)
        Dim emptyLines As New StringBuilder()
        For Each line As String In lines
            Dim s = line.Trim()
            If s.Length > 0 AndAlso Not s.StartsWith("//") Then
                emptyLines.Append(s.Trim())
            End If
        Next
        content = emptyLines.ToString()
        ' remove C styles comments
        content = Regex.Replace(content, "/\*.*?\*/", [String].Empty, RegexOptions.Compiled Or RegexOptions.Singleline)
        content = Regex.Replace(content, "^\s*", [String].Empty, RegexOptions.Compiled Or RegexOptions.Multiline)
        content = Regex.Replace(content, "\s*[\r\n]", vbCr & vbLf, RegexOptions.Compiled Or RegexOptions.ECMAScript)
        ' remove whitespace beside of left curly braced
        content = Regex.Replace(content, "\s*{\s*", "{", RegexOptions.Compiled Or RegexOptions.ECMAScript)
        ' remove whitespace beside of coma
        content = Regex.Replace(content, "\s*,\s*", ",", RegexOptions.Compiled Or RegexOptions.ECMAScript)
        ' remove whitespace beside of semicolon
        content = Regex.Replace(content, "\s*;\s*", ";", RegexOptions.Compiled Or RegexOptions.ECMAScript)
        ' remove newline after keywords
        content = Regex.Replace(content, "\\r\\n(?<=\\b(abstract|boolean|break|byte|case|catch|char|class|const|continue|default|delete|do|double|else|extends|false|final|finally|
float|for|function|goto|if|implements|import|in|instanceof|int|interface|long|native|new|null|package|private|protected|public|
return|short|static|super|switch|synchronized|this|throw|throws|transient|true|try|typeof|var|void|while|with)\\r\\n)", " ", RegexOptions.Compiled Or RegexOptions.ECMAScript)
        content = Regex.Replace(content, "[\n\r]+\s*", String.Empty) ' space
        Return content
    End Function

static void Main(string[] args)
{
    string content = File.ReadAllText("../../blog.js");
    File.WriteAllText("../../blog-min.js", StripWhitespace(content));
    Console.Write("Press any key to continue!");
    Console.Read();
}

Sub Main()
        Dim content As String = File.ReadAllText("../../blog.js")
        File.WriteAllText("../../blog-min.js", StripWhitespace(content))
        Console.WriteLine("Press any key to continue!`")
        Console.Read()
End Sub