public string RowTypeName {get; set;}

'Declaration
 
Public Property RowTypeName As String

Property Value

The RowType and RowTypeName properties are linked. Therefore, setting the RowType changes the RowTypeName to value of PgSqlRowType.Name property. When you set RowTypeName property, RowType becomes a null reference (Nothing in Visual Basic).

The RowType property can be used when you provide data as string and want to have it parsed as certain composite type. The other way to pass a PgSqlRow as parameter value is to assign a PgSqlRow object directly to Devart.Common.DbParameterBase.Value property.

Reference

PgSqlParameter Class
PgSqlParameter Members
RowType Property