https://learn.microsoft.com/en-us/dotnet/api/system.data.oracleclient.oracleparametercollection?view=netframework-4.8
OracleParameterCollection Class (System.Data.OracleClient) | Microsoft Learn
Represents a collection of parameters relevant to an OracleCommand as well as their respective mappings to columns in a DataSet. This class cannot be inherited.
class systemdatamicrosoftlearn
https://learn.microsoft.com/es-es/dotnet/api/system.data.oracleclient.oracleparametercollection.contains?view=netframework-4.8.1
OracleParameterCollection.Contains Method (System.Data.OracleClient) | Microsoft Learn
Indicates whether an OracleParameter with the specified Value is contained in the collection.
system datacontainsmethodmicrosoftlearn