Microsoft.VisualStudio.Project.ProjectElement.SetMetadata C# (CSharp) Method

        public void SetMetadata(string attributeName, string attributeValue)
        {
            if (attributeName == null)
                throw new ArgumentNullException("attributeName");
            if (string.IsNullOrEmpty(attributeName))
                throw new ArgumentException("attributeName cannot be null or empty");
            if (string.Equals(attributeName, ProjectFileConstants.Include, StringComparison.OrdinalIgnoreCase))
                throw new ArgumentException("Use Rename to set the Include attribute.");
            if (HasItemBeenDeleted)
                throw new InvalidOperationException("The item has been deleted.");

            if(this.IsVirtual)
            {
                /* For virtual node, use our virtual property collection
                 * Remove followed by Add ensures that the key in the dictionary has the same case as attributeName
                 */
                virtualProperties.Remove(attributeName);
                virtualProperties.Add(attributeName, attributeValue);
                return;
            }

            // Check out the project file.
            if(!this.ProjectManager.QueryEditProjectFile(false))
            {
                throw Marshal.GetExceptionForHR(VSConstants.OLE_E_PROMPTSAVECANCELLED);
            }

            // Build Action is the type, not a property, so intercept
            if(String.Equals(attributeName, ProjectFileConstants.BuildAction, StringComparison.OrdinalIgnoreCase))
            {
                Item.ItemType = attributeValue;
                return;
            }

            if(attributeValue == null)
                Item.RemoveMetadata(attributeName);
            else
                Item.SetMetadataValue(attributeName, attributeValue);

            ProjectManager.SetProjectFileDirty(true);
        }

        private ProjectElement GetProjectElementBasedOnInputFromComponentSelectorData()
        {
            ProjectElement element = new ProjectElement(this.ProjectMgr, this.typeName, ProjectFileConstants.COMReference);

            // Set the basic information regarding this COM component
            element.SetMetadata(ProjectFileConstants.Guid, this.typeGuid.ToString("B"));
            element.SetMetadata(ProjectFileConstants.VersionMajor, this.majorVersionNumber);
            element.SetMetadata(ProjectFileConstants.VersionMinor, this.minorVersionNumber);
            element.SetMetadata(ProjectFileConstants.Lcid, this.lcid);
            element.SetMetadata(ProjectFileConstants.Isolated, false.ToString());

            // See if a PIA exist for this component
            TypeLibConverter typelib = new TypeLibConverter();
            string           assemblyName;
            string           assemblyCodeBase;

            if (typelib.GetPrimaryInteropAssembly(this.typeGuid, Int32.Parse(this.majorVersionNumber, CultureInfo.InvariantCulture), Int32.Parse(this.minorVersionNumber, CultureInfo.InvariantCulture), Int32.Parse(this.lcid, CultureInfo.InvariantCulture), out assemblyName, out assemblyCodeBase))
            {
                element.SetMetadata(ProjectFileConstants.WrapperTool, WrapperToolAttributeValue.Primary.ToString().ToLowerInvariant());
            }
            else
            {
                // MSBuild will have to generate an interop assembly
                element.SetMetadata(ProjectFileConstants.WrapperTool, WrapperToolAttributeValue.TlbImp.ToString().ToLowerInvariant());
                element.SetMetadata(ProjectFileConstants.EmbedInteropTypes, true.ToString());
                element.SetMetadata(ProjectFileConstants.Private, true.ToString());
            }
            return(element);
        }