What's the usage of internal Currency type?

[huoyaoyuan]

runtime/src/coreclr/System.Private.CoreLib/src/System/Currency.cs

Lines 6 to 16 in 7698a9a

	internal struct Currency
	{
	internal long m_value;
	// Constructs a Currency from a Decimal value.
	//
	public Currency(decimal value)
	{
	m_value = decimal.ToOACurrency(value);
	}
	}

I guess it's used by interop scenario, but there's no reference in managed code, and I can't find corresponding unmanaged code. The name hints that it's a part of OA interop, but it's not used by OAVariantLib either.

[deeprobin]

IIRC its some Visual Basic thing.

See https://stackoverflow.com/a/151314/7600021

[huoyaoyuan]

OK, It may be better to add comment about the VB6 usage.

[jkotas]

It is used when you use [MarshalAs(UnmanagedType.Currency)] on Decimal. Look for NATIVE_TYPE_CURRENCY, MARSHAL_TYPE_CURRENCY and ILCurrencyMarshaler in the unmanaged runtime to see where it used.