Remove-Set-Write-DbaWhatever.ps1

Function Remove-DbaDatabase {
    <#
	.SYNOPSIS
	Drops a database, hopefully even the really stuck ones.

	.DESCRIPTION
	Tries a bunch of different ways to remove a database or two or more.

	.PARAMETER SqlInstance
	The SQL Server instance holding the databases to be removed.You must have sysadmin access and server version must be SQL Server version 2000 or higher.

	.PARAMETER SqlCredential
	Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted.

	$scred = Get-Credential, then pass $scred object to the -SqlCredential parameter. 

	Windows Authentication will be used if SqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials. To connect as a different Windows user, run PowerShell as that user.

	.PARAMETER Databases
	The database name to remove or an array of database names eg $database = 'DB1','DB2','DB3'

	.PARAMETER WhatIf 
	Shows what would happen if the command were to run. No actions are actually performed. 

	.PARAMETER Confirm 
	Prompts you for confirmation before executing any changing operations within the command. 

	.PARAMETER Silent 
	Use this switch to disable any kind of verbose messages

	.NOTES
	Original Author: FirstName LastName (@twitterhandle and/or website)
	Tags: Migration, Backup
	
	Website: https://dbatools.io
	Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
	License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0

	.LINK
	https://dbatools.io/Remove-DbaDatabase

	.EXAMPLE 
	Remove-DbaDatabase -SqlInstance sql2016 -Database containeddb

	Prompts then removes the database containeddb on SQL Server sql2016
		
	.EXAMPLE 
	Remove-DbaDatabase -SqlInstance sql2016 -Database containeddb, mydb
		
	Prompts then removes the databases containeddb and mydb on SQL Server sql2016
		
	.EXAMPLE 
	Remove-DbaDatabase -SqlInstance sql2016 -Database containeddb -Confirm:$false

	Does not prompt and swiftly removes containeddb on SQL Server sql2016
	#>
    [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = 'Low')]
    param (
        [parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter[]]$SqlInstance,
        [parameter(Mandatory = $false)]
		[Alias("Credential")]
		[PSCredential][System.Management.Automation.CredentialAttribute()]
		$SqlCredential,
		parameter(Mandatory)]
		[string[]]$Database,
        [switch]$Silent
    )
    process {
        
        foreach ($instance in $SqlInstance) {
            try {
                Write-Message -Level Verbose -Message "Connecting to $instance"
                $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $sqlcredential
            }
            catch {
                Stop-Function -Message "Failed to connect to: $instance" -Continue -Target $instance
            }
			
            $database = $server.Databases | Where-Object { $_.Name -in $database }
			
            foreach ($db in $database) {
                try {
                    if ($Pscmdlet.ShouldProcess("$db on $server", "KillDatabase")) {
                        $server.KillDatabase($db.name)
                        $server.Refresh()
						
                        [pscustomobject]@{
                            ComputerName = $server.NetName
                            InstanceName = $server.ServiceName
                            SqlInstance = $server.DomainInstanceName
                            Database = $db.name
                            Status = "Dropped"
                        }
                    }
                }
                catch {
                    try {
                        if ($Pscmdlet.ShouldProcess("$db on $server", "alter db set single_user with rollback immediate then drop")) {
                            $null = $server.ConnectionContext.ExecuteNonQuery("alter database $db set single_user with rollback immediate; drop database $db")
							
                            [pscustomobject]@{
                                ComputerName = $server.NetName
                                InstanceName = $server.ServiceName
                                SqlInstance = $server.DomainInstanceName
                                Database = $db.name
                                Status = "Dropped"
                            }
                        }
                    }
                    catch {
                        try {
                            if ($Pscmdlet.ShouldProcess("$db on $server", "SMO drop")) {
                                $server.databases[$dbname].Drop()
                                $server.Refresh()
								
                                [pscustomobject]@{
                                    ComputerName = $server.NetName
                                    InstanceName = $server.ServiceName
                                    SqlInstance = $server.DomainInstanceName
                                    Database = $db.name
                                    Status = "Dropped"
                                }
                            }
                        }
                        catch {
                            Write-Message -Level Verbose -Message "Could not drop database $db on $server"
							
                            [pscustomobject]@{
                                ComputerName = $server.NetName
                                InstanceName = $server.ServiceName
                                SqlInstance = $server.DomainInstanceName
                                Database = $db.name
                                Status = $_
                            }
                        }
                    }
                }
            }
        }
    }
}