unicode - Custom character mapping for System.String in C# -

I am working on the C # project, which requires custom string case mapping.

After doing some research I have found that to do this, I need to create a custom culture by using CultureAndRegionInfoBuilder.CreateFromLdml which loads an XML file that en_US But my custom case mapping rules apply, however, after reading all the applicable documents, I do not understand how this XML file will be structured.

An example of some custom case maps that I need to make:

  upper | Lower ----- | ------ (|) {| } [| ] & Lt; | & Gt; \ | /