Extension methods

There are numbers of general purpose extensions methods in TP:
System.StringExtensions, Tp.Utils

string Fmt(this string format, params object[] args) 

This is a shortcut for string.Format() method:

"Hi, {0}! Today is {1}".Fmt(name, DateTime,Now);

T ParseEnum<T>(this string name)
bool TryParseEnum<T>(this string name, out T result)

Generic versions (exception-ful and exception-free) version of Enum.Parse.

MyEnum enumValue = "EnumValue".Parse<MyEnum>();
if ("Invalid Enum".TryParse<MyEnum>(out enumValue))
{
}

System.Linq.EnumerableExtensions, Tp.Utils

string ToString<T>(this IEnumerable<T> source, string separator)
string ToString(this IEnumerable source, string separator)
 

Similar to "string.Join(string separator, string[] array)"

string ToSqlString<T>(this IEnumerable<T> ids)

Returns either "( null )" for null or empty collection or smth like "(1,2,3)"

bool IsOrdered<T>(this IEnumerable<T> items)
bool IsOrdered<T>(this IEnumerable<T> items, Comparer<T> comparer)
bool IsOrdered<T>(this IEnumerable<T> items, Comparison<T> comparison)

Checks whether a collection is ordered. Versions with Comparer and Comparison are also available (for custom comparison or inverted order).

IEnumerable<T> Concat<T>(this IEnumerable<T> items, T item)

 Shortcut for .Concat(new [] {item})

void ForEach<T>(this IEnumerable<T> items, Action<T> action)

Similar to List.ForEach()

IEnumerable<TResult> Zip<T1, T2, TResult>(this IEnumerable<T1> first, IEnumerable<T2> second, Func<T1,T2, TResult> selector)

See http://msdn.microsoft.com/en-us/library/dd267698%28VS.100%29.aspx

bool Empty<T>(this IEnumerable<T> enumerable)
bool IsNullOrEmpty<T>(this IEnumerable<T> enumerable) 

Pretty obvious.