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

1     using var windowMetrics = Registry.CurrentUser.CreateSubKey(@"Control Panel\Desktop\WindowMetrics");
 2     if (windowMetrics == null)
 3     {
 4         return;
 5     }
 6     //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
 7     //修复后，windows重启生效
 8     if (!(windowMetrics.GetValue("IconSpacing") is string iconSpacing && iconSpacing == DefaultIconSpacing))
 9     {
10         windowMetrics.SetValue("IconSpacing", DefaultIconSpacing, RegistryValueKind.String);
11     }
12     if (!(windowMetrics.GetValue("IconVerticalSpacing") is string iconVerticalSpacing && iconVerticalSpacing == DefaultIconSpacing))
13     {
14         windowMetrics.SetValue("IconVerticalSpacing", DefaultIconSpacing, RegistryValueKind.String);
15     }

默认的间距值：

private const string DefaultIconSpacing = "-1125";