System.Xml.Serialization.CodeIdentifiers.AddUnique C# (CSharp) Method

        public string AddUnique(string identifier, object value)
        {
            identifier = MakeUnique(identifier);
            Add(identifier, value);
            return identifier;
        }

 internal string GenerateBaseSerializer(string baseSerializer, string readerClass, string writerClass, CodeIdentifiers classes)
 {
     baseSerializer = CodeIdentifier.MakeValid(baseSerializer);
     baseSerializer = classes.AddUnique(baseSerializer, baseSerializer);
     this.writer.WriteLine();
     this.writer.Write("public abstract class ");
     this.writer.Write(CodeIdentifier.GetCSharpName(baseSerializer));
     this.writer.Write(" : ");
     this.writer.Write(typeof(XmlSerializer).FullName);
     this.writer.WriteLine(" {");
     this.writer.Indent++;
     this.writer.Write("protected override ");
     this.writer.Write(typeof(XmlSerializationReader).FullName);
     this.writer.WriteLine(" CreateReader() {");
     this.writer.Indent++;
     this.writer.Write("return new ");
     this.writer.Write(readerClass);
     this.writer.WriteLine("();");
     this.writer.Indent--;
     this.writer.WriteLine("}");
     this.writer.Write("protected override ");
     this.writer.Write(typeof(XmlSerializationWriter).FullName);
     this.writer.WriteLine(" CreateWriter() {");
     this.writer.Indent++;
     this.writer.Write("return new ");
     this.writer.Write(writerClass);
     this.writer.WriteLine("();");
     this.writer.Indent--;
     this.writer.WriteLine("}");
     this.writer.Indent--;
     this.writer.WriteLine("}");
     return baseSerializer;
 }