Revised and merged the subtraction operator articles #12541
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BillWagner
reviewed
May 28, 2019
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Overall, this looks great @pkulikov
I'll review again once we've discussed the possible additional sample.
| For operands of the same [delegate](../keywords/delegate.md) type, the `-` operator returns a delegate instance that is calculated as follows: | ||
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| - If both operands are non-null and the invocation list of the second operand is a proper contiguous sublist of the invocation list of the first operand, the result of the operation is a new invocation list that is obtained by removing the second operand's entries from the invocation list of the first operand. If the second operand's list matches multiple contiguous sublists in the first operand's list, only the right-most matching sublist is removed. If removal results in an empty list, the result is `null`. | ||
| - If the invocation list of the second operand is not a proper contiguous sublist of the invocation list of the first operand, the result of the operation is the first operand. |
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Related to my comments on dotnet/samples#929 This is the condition that often surprises developers. An example would help.
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closing and re-opening for a new build. |
BillWagner
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May 28, 2019
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This LGTM @pkulikov
Thanks for continuing to do so much of the work on the C# language reference.
I'll 
now.
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Supported by dotnet/samples#929
Contributes to #10741