如果从PSCmdlet派生，则可以从二进制cmdlet设置PowerShell变量：

using System.Management.Automation;

public class MyCmdlet : PSCmdlet
{
    protected override void ProcessRecord()
    {
        this.SessionState.PSVariable.Set("VerbosePreference", ActionPreference.Continue);
    }
}

要在cmdlet中临时启用详细输出，我使用如下代码：

public class MyCmdlet : PSCmdlet
{
    protected override void ProcessRecord()
    {
        using var _ = this.EnableVerbose();
        //... cmdlet implementation
    }
}

static class UseVariableExtension
{
    public static IDisposable EnableVerbose(this PSCmdlet cmdlet) => new WithVariableValue(cmdlet, "VerbosePreference", ActionPreference.Continue);

    class WithVariableValue : IDisposable
    {
        readonly PSCmdlet _cmdlet;
        readonly string _variableName;
        readonly object _originalValue;

        public WithVariableValue(PSCmdlet cmdlet, string variableName, object? value)
        {
            _cmdlet = cmdlet;
            _variableName = variableName;
            _originalValue = cmdlet.GetVariableValue(variableName);
            cmdlet.SessionState.PSVariable.Set(variableName, value);
        }

        public void Dispose()
        {
            _cmdlet.SessionState.PSVariable.Set(_variableName, _originalValue);
        }
    }
}