关于警告 Field “Class1.aaa” is never assigned to, and will always have its default value null Windows的问题

警告 CS0649 Field ‘Class1.aaa’ is never assigned to, and will always have its default value null WindowsFormsApplication7
长话短说
写c#多个窗体之间传值（详细教程https://blog.csdn.net/bullzerone/article/details/73719031?tdsourcetag=s_pcqq_aiomsg）出现经过本人研究 是因为反了，应该是是 Class aaa = textBox1.Text
（而不是图片中的那样，图片所示会导致两者指定空集 所以运行是显示不出数据并且报错。）
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