private string QuoteSnippetStringVerbatimStyle(string value)
{
var b = new StringBuilder(value.Length + 5);
b.Append("@\"");
for (int i = 0; i < value.Length; i++)
{
if (value[i] == '\"')
b.Append("\"\"");
else
b.Append(value[i]);
}
b.Append('\"');
return b.ToString();
}