https://learn.microsoft.com/en-us/dotnet/api/system.data.sqltypes.sqlsingle.op_unarynegation?view=netframework-4.8.1&viewFallbackFrom=net-10.0
SqlSingle.UnaryNegation(SqlSingle) Operator (System.Data.SqlTypes) | Microsoft Learn
Negates the Value of the specified SqlSingle structure.
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