Mono.CSharp.MemberCore.CheckAbstractAndExtern C# (CSharp) Метод

		protected bool CheckAbstractAndExtern (bool has_block)
		{
			if (Parent.PartialContainer.Kind == MemberKind.Interface)
				return true;

			if (has_block) {
				if ((ModFlags & Modifiers.EXTERN) != 0) {
					Report.Error (179, Location, "`{0}' cannot declare a body because it is marked extern",
						GetSignatureForError ());
					return false;
				}

				if ((ModFlags & Modifiers.ABSTRACT) != 0) {
					Report.Error (500, Location, "`{0}' cannot declare a body because it is marked abstract",
						GetSignatureForError ());
					return false;
				}
			} else {
				if ((ModFlags & (Modifiers.ABSTRACT | Modifiers.EXTERN | Modifiers.PARTIAL)) == 0 && !(Parent is Delegate)) {
					if (RootContext.Version >= LanguageVersion.V_3) {
						Property.PropertyMethod pm = this as Property.PropertyMethod;
						if (pm is Indexer.GetIndexerMethod || pm is Indexer.SetIndexerMethod)
							pm = null;

						if (pm != null && pm.Property.AccessorSecond == null) {
							Report.Error (840, Location,
								"`{0}' must have a body because it is not marked abstract or extern. The property can be automatically implemented when you define both accessors",
								GetSignatureForError ());
							return false;
						}
					}

					Report.Error (501, Location, "`{0}' must have a body because it is not marked abstract, extern, or partial",
					              GetSignatureForError ());
					return false;
				}
			}

			return true;
		}