KeyNotFoundException: The given key was not present in the dictionary.
System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) (at <c8d0d7b9135640958bff528a1e374758>:0)
存放的东西在子节点的变量中，根节点确实没办法直接很快找到并删除，除非遍历，但是遍历很耗时，太菜了哈哈哈哈，换其他方法去加速了。
一开始搜英文，毫无头绪。中文就有其他更多的错误以及改正。
KeyNotFoundException: The given key was not present in the dictionary.System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) (at <c8d0d7b9135640958bff528a1e374758>:0)存放的东西在子节点的变量中，根节点确实没办法直接很快找到并删除，除非遍历，但是遍历很耗时，太菜了哈哈哈哈，换其他方法去加速了。
C#
连接mysql 时报错'The
given
key
was not pre
sent
in the
dictionary
.'
原因是数据库的连接客串Character Set 值不能为大写.
例如：Character Set =UTF8 则就会起这种问题。
“System.Collections.Generic.
Key
NotFoun
dEx
c
eption
”类型的异常在 mscorlib.dll
中
发生，但未在用户代码
中
进行处理
其他信息:
给定
关键字
不在
字典
中
。
string sql = string.Format("Database={0};Data Source={1};User Id={2};Password={3};", database, host, id, pwd, "3306");
在命令后面加上“charset=utf8”定义字符串的编码格式。
string sqlString = string.Format("Database={0};Data Source={1};User Id={2};Password={...
System.Reflection.TargetInvocationExc
eption
: Exc
eption
has been thrown by the target of an invocation. ---> System.Collections.Generic.
Key
NotFoun
dEx
c
eption
: The
given
key
was not pre
sent
in the
dictionary
.
System.Reflection.TargetInvocationExcepti...
https://blog.csdn.net/qq_42462109/article/details/83385658
参考这篇博文做MySql连接测试，发现一直报“The
given
key
was not pre
sent
in the
dictionary
”的错误；
后来查了半天资料结果是因为连接字符串未定义字符编码格式，吧charset=utf8添加到原连接字符串后，问题就解决了
The program implements the use of χ2 test for determining the distribution law of fluctuations of the signals. Hypotheses about the distribution of this or innogo parameter system, such as expectation, variance, probability density for a
given
level of significance accepted or refuted, in accordance with the results. The program implements two distributions: the exponential and Rayleigh.
Calculate the distance of a
given
point P from a triangle TRI. Point P is a row vector of the form 1x3. The triangle is a matrix formed by three rows of points TRI = [P1 P2 P3] each of size 1x3. dist = pointTriangleDistance(TRI,P) returns the distance of the point P to the triangle TRI. [dist,PP0] = pointTriangleDistance(TRI,P) additionally returns the closest point PP0 to P on the triangle TRI
zzhclc:
unity 层次包围盒 AABB树
zzhclc:
