Read a published Google spreadsheet into a DataTable using GData

var service = new SpreadsheetsService(null);
var query = new ListQuery("0AjD5UGMt5CGDdEcwaS10S2IzVzJFNDYtaEo5anN2RHc", "1", "public", "values");
var feed = service.Query(query);
var table = new DataTable();
foreach (ListEntry entry in feed.Entries)
{
    var row = table.NewRow();
    foreach (ListEntry.Custom element in entry.Elements)
    {
        var column = table.Columns[element.LocalName] ??
                     table.Columns.Add(element.LocalName);
        row[column] = element.Value;
    }
    table.Rows.Add(row);
}

Google Data API .NET client library

Determine if a WinForms control resource file is localized

XPathDocument doc;
using (var stream = File.OpenRead(fileName))
{
    doc = new XPathDocument(stream);
}
var nav = doc.CreateNavigator();
var itr = nav.Select("root/data[@name = '>>$this.Name']");
var localized = itr.Count > 0;

Remove matching C# region directives using LINQ

var flag = false;
var modified = false;
var lines = File.ReadLines(fileName)
    .Where(line =>
        {
            if ((!flag && line.Contains("#region " + regionName)) ||
                (flag && line.Contains("#endregion")))
            {
                flag = !flag;
                modified = true;
                return false;
            }
            return true;
        })
    .ToArray();
if (modified)
{
    File.WriteAllLines(fileName, lines);
}

Compile and execute a stateful T4 template using Mono.TextTemplating

var input =
    "<#@ template language=\"C#\" debug=\"true\" #>" +
    "<#+ static int num; #>" +
    "<#= num++ #>";
var generator = new TemplateGenerator();
var compiled = generator.CompileTemplate(input);
Debug.Assert(Equals(compiled.Process(), "0"));
Debug.Assert(Equals(compiled.Process(), "1"));
Debug.Assert(Equals(compiled.Process(), "2"));

Mono.TextTemplating