Visual Studio 2015设计器崩溃

Question

I have this method:

static public void WriteErrorToFile(string ErrorMassege, string HelpLink)
{
    string text = DateTime.Now.ToString() + ":" + Environment.NewLine + ErrorMassege + Environment.NewLine;

    if (!string.IsNullOrWhiteSpace(HelpLink))
    {
        text += "Help link: " + HelpLink + Environment.NewLine;
    }

    text += Environment.NewLine;
    File.AppendAllText("errors.txt", text);
}

I call this method every time some expception occurred, but then the designer in Visual Studio 2015 crashes with massege:

UnauthorizedAccessException: Access to the path 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\Common7\\IDE\\errors.txt' is denied.

If that mean something to you I call this function in MyViewModel what is datacontext of my page. If I delete errors.txt file then everything is normal again. Anyone knows why this happen and what is the soulution?

Answer 1

问题是WPF设计人员必须执行代码才能在viewModel上查看可用的数据， DesignerProperties包含GetIsInDesignMode方法，当设计人员执行代码时，可以使用该方法禁用逻辑