char m1 = '\0'; //最简
char m2 = char.MinValue; //最值得推荐
char m3 = (char)0;
char m4 = Convert.ToChar(0); //类似m3
char m5 = ((char?)null).GetValueOrDefault();
转载于:https://www.cnblogs.com/lilixinshu/archive/2007/08/31/876936.html