using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Easy4net.Common { public class Field { private String fieldName; //不允许不传参数的构造函数 private Field() { } public Field(String name) { fieldName = name; } public static WhereExpression operator ==(Field field, Object value) { return null; } public static WhereExpression operator !=(Field field, Object value) { return null; } public static WhereExpression operator >(Field field, Object value) { return null; } public static WhereExpression operator >=(Field field, Object value) { return null; } public static WhereExpression operator <(Field field, Object value) { return null; } public static WhereExpression operator <=(Field field, Object value) { return null; } } }