string ToStringSafe(this object obj)

string ToStringSafe(this object obj, string defaultValue)

If object is null then returns null or defaultValue, otherwise result of ToString().

TInput IfNotNull<TInput>(this TInput obj, Action<TInput> evaluator)

TResult IfNotNull<TInput, TResult>(this TInput obj, Func<TInput, TResult> evaluator)

TResult IfNotNull<TInput, TResult>(this TInput obj, Func<TInput, TResult> evaluator, TResult def)

If object is not null then evaluator is colled on this object.

Returned value depends which function was called:

• TInput IfNotNull<TInput>(this TInput obj, Action<TInput> evaluator)

  Returns object on which function was called

• TResult IfNotNull<TInput, TResult>(this TInput obj, Func<TInput, TResult> evaluator)

  Returns value returned by evaluator or default(TResult)

• TResult IfNotNull<TInput, TResult>(this TInput obj, Func<TInput, TResult> evaluator, TResult def)

  Returns value returned by evaluator or given def value