private Theme GenerateTheme()
{
Theme theme = new Theme()
{
Name = "Office Theme"
};
theme.AddNamespaceDeclaration("a", "http://schemas.openxmlformats.org/drawingml/2006/main");
ThemeElements themeElements = new ThemeElements();
themeElements.Append(GenerateColorScheme());
theme.Append(themeElements);
return(theme);
}