c# 获取变量名称

示例：

public class Test
{
	public int tInt;
	public bool tBool;
}
var t = new Test();
Console.WriteLine(t.tInt) ///打印 tInt

public static string GetFieldName(object obj)
{
    Expression<Func<object>> expr = () => obj;
    if (expr.Body is MemberExpression memberExpr)
    {
       return memberExpr.Member.Name;
    }
    throw new ArgumentException("非法", nameof(obj));
}