how to write correct PInvoke structs in C#?

[R Rajesh]

I have c++ structure and function as follows

struct InnerStruct
{
  DWORD* data;
  INT16* values 
};

struct OuterStruct
{
  char* name;
  InnerStruct* inner;
}

__declspec( dllexport) void Method(OuterStruct* value);

I have created necessary PInvoke in C# as follows

[StructLayout(LayoutKind.Sequential)]
public struct InnerStruct
{
public uint[] data;//Uint32*

public Int16[] values;//Int16*
}

[StructLayout(LayoutKind.Sequential)]
public struct OuterStruct
{
public string name;
public InnerStruct[] inner;
}

[DllImport("dllname.dll", CallingConvention=CallingConvention.Cdecl)]
public static extern void Method(ref OuterStruct value);

When I pass OuterStruct parameter to unmanaged function, InnerRects data and values are giving wrong values in unmanaged side(looks like data corrupted). When, I used MarshalAs attribute over data and values with LPArray to make it c-style array it causing
AccessViolation Execption stating "Attempted to read or write protected memory. This is often an indication that other memory is corrupt". Is any-one have idea on how to write correct PInvoke structs in C# for this, please help me.