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You can carry out a little experiment with the sample code. Open the source file Simple.il in any text editor and modify it by moving the declaration of the value type CharArray8 in front of the declaration of the field Format:
{
⋮
} // End of namespace
.class public explicit CharArray8
extends [mscorlib]System.ValueType { .size 8 }
.field public static valuetype CharArray8 Format at FormatData