SqlBulkCopy - 给定的ColumnName与源或目标中的任何列都不匹配

I'm trying to use SqlBulkCopy to copy data into an SQL database table however it is (wrongly) saying that the columns don't match. They do match. If I use a breakpoint to see the names of the columns being mapped, they're correct. The error message shows the name of the column, and it is correct.I'm trying to use SqlBulkCopy to copy data into