以下代码显示了一个 cmdlet Get-Process 的实现，该 cmdlet 报告非终止错误。 此实现调用 System.Management.Automation.Cmdlet.WriteError 方法报告非终止错误。
注释
可以使用适用于 Windows Vista 和 .NET Framework 3.0 运行时组件的 Microsoft Windows 软件开发工具包下载此 Get-Proc cmdlet 的 C# 源文件（getprov04.cs）。 有关下载说明，请参阅 如何安装 Windows PowerShell 并下载 Windows PowerShell SDK。 <PowerShell 示例> 目录中提供了下载的源文件。
代码示例
namespace Microsoft.Samples.PowerShell.Commands
{
using System;
using System.Diagnostics;
using System.Management.Automation; // Windows PowerShell namespace.
#region GetProcCommand
/// <summary>
/// This class implements the get-proc cmdlet.
/// </summary>
[Cmdlet(VerbsCommon.Get, "Proc")]
public class GetProcCommand : Cmdlet
{
#region Parameters
/// <summary>
/// The names of the processes to act on.
/// </summary>
private string[] processNames;
/// <summary>
/// Gets or sets the list of process names on
/// which the Get-Proc cmdlet will work.
/// </summary>
[Parameter(
Position = 0,
ValueFromPipeline = true,
ValueFromPipelineByPropertyName = true)]
[ValidateNotNullOrEmpty]
public string[] Name
{
get { return this.processNames; }
set { this.processNames = value; }
}
#endregion Parameters
#region Cmdlet Overrides
/// <summary>
/// The ProcessRecord method calls the Process.GetProcesses
/// method to retrieve the processes specified by the Name
/// parameter. Then, the WriteObject method writes the
/// associated processes to the pipeline.
/// </summary>
protected override void ProcessRecord()
{
// If no process names are passed to cmdlet, get all
// processes.
if (this.processNames == null)
{
WriteObject(Process.GetProcesses(), true);
}
else
{
// If process names are passed to the cmdlet, get and write
// the associated processes.
// If a nonterminating error occurs while retrieving processes,
// call the WriteError method to send an error record to the
// error stream.
foreach (string name in this.processNames)
{
Process[] processes;
try
{
processes = Process.GetProcessesByName(name);
}
catch (InvalidOperationException ex)
{
WriteError(new ErrorRecord(
ex,
"UnableToAccessProcessByName",
ErrorCategory.InvalidOperation,
name));
continue;
}
WriteObject(processes, true);
} // foreach (string name...
} // else
} // ProcessRecord
#endregion Overrides
} // End GetProcCommand class.
#endregion GetProcCommand
}
