C# 修复桌面图标间距问题

Windows在某些情况(系统文件损坏、注册表错误、驱动不兼容等)下，桌面图标间距变得超大，占满整个桌面。

整理下，C#按如下方式修复

    using var windowMetrics = Registry.CurrentUser.CreateSubKey(@"Control Panel\Desktop\WindowMetrics");
    if (windowMetrics == null)
    {
        return;
    }
    //默认情况下，水平和垂直间距的值都是-1125。范围是-480到-2730之间的任何整数
    //修复后，windows重启生效
    if (!(windowMetrics.GetValue("IconSpacing") is string iconSpacing && iconSpacing == DefaultIconSpacing))
    {
        windowMetrics.SetValue("IconSpacing", DefaultIconSpacing, RegistryValueKind.String);
    }
    if (!(windowMetrics.GetValue("IconVerticalSpacing") is string iconVerticalSpacing && iconVerticalSpacing == DefaultIconSpacing))
    {
        windowMetrics.SetValue("IconVerticalSpacing", DefaultIconSpacing, RegistryValueKind.String);
    }

默认的间距值：

private const string DefaultIconSpacing = "-1125";