powershell如果条件是否可以验证特殊charcs的字符串是空的还是空的

Question

它具有如下以下价值

Azuresecret is  <publishData><publishProfile profileName="a00008dfdgdfhfg" - Web Deploy" publishMethod="MSDeploy" publishUrl="a00008w543tgddg" <databases /></publishProfile></publishData>

我有一个github的秘密， 但是，我收到许多错误消息，

  ... g]::IsNullOrEmpty("<publishData><publishProfile profileName="a00008-a ...
   +                                                                  ~
   Missing ')' in method call.

 Missing closing ')' in expression.
      At E:\_temp\0007a890-9ecb-4cce-b1e.ps1:10 char:90
    + ... a><publishProfile profileName="a00008-accountsfunctionapp-dev - Web D ...
      +                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Missing closing ')' after expression in 'if' statement.

任何帮助都将受到高度赞赏