C＃错误？ -用户代码未处理System.NullReferenceException

Question

I keep getting this error even tho the strings that i want to call to a function aren't null

(As you can see in pic the string isn't null)

This is the error

System.NullReferenceException was unhandled by user code
Message=Object reference not set to an instance of an object.

I even added some code to "handle", I mean to see if the strings are null, and they aren't but still it shows the error

if (opp1name != null && opp2name != null && opp3name != null)

This may be useful too?

Answer 1

This could also occur if pl is null , or if something required within the pl.Send method (aside from the passed arguments) is null .

Make sure to properly instantiate pl (so it is not null), as this is the most likely cause of the issue.