ref keyword example in .NET framework library

.net, c#

Solution

Yes, for example the various overloads of `Interlocked.Exchange`:

public static double Exchange(
ref double location1,
double value
)

Problem

`DateTime.TryParse` method has a `DateTime` `out` parameter. ``` public static bool TryParse(string s, out DateTime result) ``` Is there any such usage of the `ref` keyword in .NET framework?

Original source