Variable names not case sensitive

[SebZar]

Hi,
I'm not sure it's a bug report or a enhancement request.

All formulars are parsed to lower case, but it would be nice to use case sensitive variable names.

Okay, result: 30

var processor = new xFunc.Maths.Processor();
var expr = processor.Parse("a + B");
var parameters = new xFunc.Maths.Expressions.Collections.ParameterCollection();
parameters.Add("a", 10);
parameters.Add("b", 20);
var bla = expr.Execute(parameters);

Not okay, result: null

var processor = new xFunc.Maths.Processor();
var expr = processor.Parse("a + B");
var parameters = new xFunc.Maths.Expressions.Collections.ParameterCollection();
parameters.Add("a", 10);
parameters.Add("B", 20);
var bla = expr.Execute(parameters);

[sys27]

Hi, it looks like a bug. Initially, it was implemented the following way: variable names are parsed case-sensitive, and other things are case-insensitive. Probably, it was broken by #236.