杭州临江花园2017房价:关于asp.net语句的意思

[ToolboxItem("System.Web.UI.Design.WebControlToolboxItem, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), DesignerSerializer("Microsoft.VSDesigner.WebForms.ControlCodeDomSerializer, Microsoft.VSDesigner, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", "System.ComponentModel.Design.Serialization.CodeDomSerializer, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), ToolboxItemFilter("System.Web.UI", ToolboxItemFilterType.Require), DefaultProperty("ID"), DesignerCategory("Code"), Designer("System.Web.UI.Design.ControlDesigner, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), PermissionSet(SecurityAction.LinkDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n"), PermissionSet(SecurityAction.InheritanceDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n")]
public class Control : IComponent, IDisposable, IParserAccessor, IDataBindingsAccessor
请反译一下。
还有PublicKeyToken=b77a5c561934e089，这个是什么意思？是加密吗