EmitStoreToAddress.cs

public static void EmitStoreToAddress(this ILGenerator il, Type type)
{
    if (type.IsValueType)
    {
        // Pick the optimal opcode to set a value type
        OpCode opcode = Marshal.SizeOf(type) switch
        {
            // Use the faster op codes for sizes <= 8
            1 when type == typeof(byte) || type == typeof(sbyte) => OpCodes.Stind_I1,
            2 when type == typeof(short) || type == typeof(ushort) => OpCodes.Stind_I2,
            4 when type == typeof(float) => OpCodes.Stind_R4,
            4 when type == typeof(int) || type == typeof(uint) => OpCodes.Stind_I4,
            8 when type == typeof(double) => OpCodes.Stind_R8,
            8 when type == typeof(long) || type == typeof(ulong) => OpCodes.Stind_I8,

            // Default to stobj for all other value types
            _ => OpCodes.Stobj
        };

        // Also pass the type as argument if stobj is used
        if (opcode == OpCodes.Stobj) il.Emit(opcode, type);
        else il.Emit(opcode);
    }
    else il.Emit(OpCodes.Stind_Ref);
}