static void Main(string[] args)
{
// FieldInfo's SetValue operates on an object, which means
// that simply passing it a struct will box it, and change
// the fields on that boxed copy, then discarding the output.
// We need to be smart (just like here https://social.msdn.microsoft.com/Forums/vstudio/en-US/33284e33-d004-4b76-bc0f-50100ec46bf1/fieldinfosetvalue-dont-work-in-struct?forum=csharpgeneral)
// and box ourselves, keep a reference to the boxed struct,
// modify the fields using that reference, then assign
// the unboxed struct to our original struct
// Box our struct
object boxedBigStruct = bigStruct;
// Initialize the variable
FieldInfo[] allFields = typeof(MyDynamicStruct).GetFields();
for (int i = 0; i < allFields.Length; i++)
{
allFields[i].SetValue(boxedBigStruct, 1);
}
bigStruct = (MyDynamicStruct)boxedBigStruct;
Console.WriteLine("Initialization complete");
Thread.Sleep(500);
RunAgainstCopiedData(bigStruct);
// Wait so that dotTrace can initiate a snapshot
Console.WriteLine("done");
Console.ReadLine();
}
static void RunAgainstCopiedData(MyDynamicStruct param)
{
Thread.Sleep(500);
// Same workaround is performed here
object boxedParamStruct = param;
// Set all the fields of the passed Struct to a different value
FieldInfo[] allFields = typeof(MyDynamicStruct).GetFields();
for (int i = 0; i < allFields.Length; i++)
{
allFields[i].SetValue(boxedParamStruct, 2);
}
param = (MyDynamicStruct)boxedParamStruct;
}
