c# - 无法将字符串隐式转换为文本框

Question

当我在以下两行上构建时，我收到以下失败消息

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Exceptions = message.Substring(trav + 1, expdiff - 1); ExceptionList.Add(异常);

Answer 1

Exceptions.Text = message.Substring(trav + 1, expdiff - 1);
ExceptionList.Add(Exceptions.Text);