As a beginner, I am just so confused with IField, IFieldEdit, IFields, IFieldsEdit.
Grateful that someone can help this so I can understand it in a logical way.
Sub Question 1: What are the relations among them? And what can be the easier way to understand their purpose after their instance creation?
Sub Question 2: How to understand the following coding?
// I guess both pFields and pField use FieldsClass() to create an instance
IFields pFields = new FieldsClass();
IField pField = new FieldClass();
// Can I comprehend in this way that pFieldsEdit and pFieldEdit are created to "inherit" members and methods of pFields and pField, respectively?
IFieldsEdit pFieldsEdit = (IFieldsEdit)pFields;
IFieldEdit pFieldEdit = (IFieldEdit)pField;
// Some value assignment on pFieldEdit
pFieldEdit.Name_2 = "Shape";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
// .... some code here ....code related to IField or IFields are shown here....
pFieldEdit.GeometryDef_2 = pGeometryDef;
// The above code shows nothing to do with pField, but what happened to pField after operations on pFieldEdit ?
pFeatureClass = pFWS.CreateFeatureClass(shapeName, pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");