System.Data.XSDSchema.GetNamespaceFromPrefix C# (CSharp) Method

        private string GetNamespaceFromPrefix(string prefix)
        {
            if ((prefix == null) || (prefix.Length == 0))
                return null;
            foreach (XmlSchema schemaRoot in _schemaSet.Schemas())
            {
                XmlQualifiedName[] qualifiedNames = schemaRoot.Namespaces.ToArray();
                for (int i = 0; i < qualifiedNames.Length; i++)
                {
                    if (qualifiedNames[i].Name == prefix)
                        return qualifiedNames[i].Namespace;
                }
            }
            return null;
        }