CODEWITHSUNDEEP
c#
Water
Water

Reputation: 3715

How to get the size of a struct from a generic type when Marshal.SizeOf is obsolete?

According to the Marshal.SizeOf() MSDN docs:

Warning

This API is now obsolete.

What is the proper way to get the struct size without using this obsolete function? We can assume .NET Core 2.1 and C# 8.

I need to use this on a generic type, so my code reads similar to this pseudocode:

...<T> where T : struct
{
    ...
    // Note that T will have [StructLayout(LayoutKind.Sequential, Pack = 1)]
    assert(something == Marshal.SizeOf(typeof(T)) ...)
}

Upvotes: 0

Views: 86

Answers (1)

user2892158
user2892158

Reputation: 38

You can use Marshal.SizeOf<T>()

For example:

struct DDType
{
    public int No1 { get; set; }
    public int No2 { get; set; }
    public string Name { get; set; }
}

Marshal.SizeOf<DDType>();

Upvotes: 1

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