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I have downloaded latest source code .
But I can not build Demo.
There are many '?.Invoke' in code.
ex) this.ActionPerformed?.Invoke(this, new WorkbookActionEventArgs(e.Action));
I don't know what's ?. operator.
I guess some charactor is changed by charactor code.
But I also don't know what's original code.
I had tried to replace ?. to just . only.
It occur another problem.
I'm using VS 2013 and .Net 4.5
Please, help me.
Last edited by redgump (2017-03-09 23:20:51)
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