public void RemoveAssetTag(string tag)
{
foreach (PBXBuildFileData data in this.BuildFilesGetAll())
{
data.assetTags.Remove(tag);
}
foreach (string str in this.nativeTargets.GetGuids())
{
this.RemoveAssetTagFromDefaultInstall(str, tag);
}
this.project.project.knownAssetTags.Remove(tag);
}