= And! = It is a bit different from the Master. We recommend that you use equals whenever possible during comparison.

When we compared the information of two fields today, we thought they were all data in the same column, and we could get the result by comparing them directly, but we found that DT. rows [J] [k] = DT. the returned value of rows [J + 1] [k] is always false, and is changed to DT. rows [J] [K]. equals (DT. solve the problem after rows [J + 1] [K.

Get the result by querying msdn:

For pre-defined value types, if the value of the operand is equal, the equal operator (=) returns true. Otherwise, false is returned.
For DivisionStringIf two operands reference the same object, the = returns true.
ForStringType, = will compare the string value.

It seems that programming cannot trust intuition.