How to allocate 2 or more GB ?

The size parameter to the allocation is defined as an int. This precludes allocations of 2 or more GB in a single call. At the very least, the 'int cb' should have been a 'uint cb'.

I would also argue that in 64-bit addressing it should be a long (or a ulong)... welcome to the 64-bit world.

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* ID: ec1aaf4e-d08b-7d7b-a2bb-6e5cdbba5552
* Version Independent ID: 62bc5f30-97ac-bc21-47e2-7c4faffe602e
* Content: [Marshal.AllocCoTaskMem(Int32) Method (System.Runtime.InteropServices)](https://docs.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.marshal.alloccotaskmem?view=netframework-4.7.2)
* Content Source: [xml/System.Runtime.InteropServices/Marshal.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Runtime.InteropServices/Marshal.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

Start with xml/System.Runtime.InteropServices/Marshal.xml and the linked Marshal.AllocCoTaskMem(Int32) reference page. Verify whether the reported Int32 limitation is a documentation discrepancy or an API design request, and check the repository's guidance for API reference changes. Done means the documentation accurately reflects the supported API or the issue is routed as an API change request.

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