xamarinmac 
namespace System.Data.OleDb
{
    [DefaultMember("Item")]
    [Editor("Microsoft.VSDesigner.Data.Design.DBParametersEditor, Microsoft.VSDesigner, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", "System.Drawing.Design.UITypeEditor, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
    public sealed class OleDbParameterCollection : DbParameterCollection
    {
        public override int IndexOf(string! parameterName);
    }
}
.NET
5.06.07.08.09.010.0
.NET Core
2.02.12.23.03.1
.NET Framework
1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
2.02.1
Information specific to xamarinmac
Assemblies

System.Data.OleDb , Version=9.0.0.3, PublicKeyToken=cc7b13ffcd2ddd51

System.Data.OleDb , Version=10.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

Your project needs a package reference to System.Data.OleDb.

Package System.Data.OleDb (9.0.3) netstandard2.0
Platform Restrictions

This API is only supported on the following platforms:

  • Windows
  • Built-in API
  • Package-provided API