string s = "sdjfasdfjjlasdhfueiuhjfklhasdlkfjhasdjfasdlk";
IEnumerable<char> distinctList = s.Distinct();
return distinctList.Count();
C#真是优美。
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string s = "sdjfasdfjjlasdhfueiuhjfklhasdlkfjhasdjfasdlk";
IEnumerable<char> distinctList = s.Distinct();
return distinctList.Count();
C#真是优美。
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