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    <p>I'm unsure of exactly what you are asking. Are you trying to get an equivalent structure definition in C# for plain old C# usage or for interop (PInvoke) purposes? If it's for PInvoke the follownig structure will work</p> <pre><code>[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)] public struct tPacket { /// WORD-&gt;unsigned short public ushort word1; /// WORD-&gt;unsigned short public ushort word2; /// BYTE-&gt;unsigned char public byte byte1; /// BYTE-&gt;unsigned char public byte byte2; /// BYTE[8] [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst=8, ArraySubType=System.Runtime.InteropServices.UnmanagedType.I1)] public byte[] array123; } </code></pre> <p>If you are looking for a plain old C# structure that has the same characteristics, it's unfortunately not possible to do with a struct. You cannot define an inline array of a contstant size in a C# structure nor can you force the array to be a specific size through an initializer. </p> <p>There are two alternative options in the managed world.</p> <p>Use a struct which has a create method that fills out the array </p> <pre><code>[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)] public struct tPacket { public ushort word1; public ushort word2; public byte byte1; public byte byte2; public byte[] array123; public static tPacket Create() { return new tPacket() { array123 = new byte[8] }; } } </code></pre> <p>Or alternatively use a class where you can initialize the array123 member variable directly.</p> <p><strong>EDIT</strong> OP watns to know how to convert a byte[] into a tPacket value</p> <p>Unfortunately there is no great way to do this in C#. C++ was awesome for this kind of task because has a very weak type system in that you could choose to view a stream of bytes as a particular structure (evil pointer casting). </p> <p>This may be possible in C# unsafe code but I do not believe it is. </p> <p>Essentially what you will have to do is manually parse out the bytes and assign them to the various values in the struct. Or write a native method which does the C style casting and PInvoke into that function. </p>
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    1. POHow can I put an array inside a struct in C#?
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    1. COHmm,alright,but how to add the array into the structure?
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      1. USIvan Prodanov
    2. CO@John, both samples include the array in the structure. I'm not quite sure what you're asking
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    3. CO@JaredPar, the C++ code is used along with receiving a packet.When the packet is received ,the variable packet stores the data in the structure tPacket and later accesses them.The real members are Size,Opcode,SeedCRC,SeedSecurity,EncryptedData and the fatal one - blowfish,which is the array.
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