. NET Framework-array Detailed introduction

The array is the most basic data collection provided by. NET, which accesses the collection elements directly through the index. Provides one-dimensional or multidimensional data storage and supports operations such as, querying, searching, sorting, copying, and so on.
The main interfaces provided, according to the semantic division, mainly include:

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One-dimensional array declaration, creation, initialization:
1) directly within the initializer:

           Int[] MP = new Int[6] {-50,-30,-10, 10, 30, 50};

2) Assign values separately:

            Mp[0] = -50;            MP[1] = -30;            MP[2] = -10;            MP[3] = ten;            MP[4] =;            MP[5] = 50;

As shown, the number of one-dimensional graphs is 0,1,2,3,4,5

Multidimensional (for example, two-dimensional) array declaration, creation, initialization: (as shown, two-dimensional numbering is 0,1,2,3,4,5)

            int[,] point = new int[2, 6] {             {-50,-30,-10, 10, 30, 50},//No. 0 dimension             {50, 30, 10, 10, 30, 50}//1th dimension                                          };

Initialize separately:

            Point 0            point[0, 0] = -50;            point[1, 0] =;            Point 1            point[0, 1] = -30;            Point[1, 1] =;            Point 2            point[0, 2] = -10;            Point[1, 2] = ten;            Point 3            point[0, 3] = ten;            Point[1, 3] = ten;            Point 4            point[0, 4] =;            Point[1, 4] =;            Point 5            point[0, 5] =;            Point[1, 5] = 50;

The semantic differences between one-dimensional and multidimensional-interface methods were compared:

            Gets the number of elements of a dimension            int mpLen0 = MP. GetLength (0);//6            int pointLen0 = point. GetLength (0);//2            int pointLen1 = point. GetLength (1);//6            //Gets the subscript maximum value of a dimension            int mpupperbound = MP. GetUpperBound (0); 5            int pointUpperBound0 = point. GetUpperBound (0);//1            int pointUpperBound1 = point. GetUpperBound (1);//5            //Gets the subscript minimum value for a dimension            int mplowbound = MP. Getlowerbound (0);//0            int pointLowBound0 = point. Getlowerbound (0);//0            int pointLowBound1 = point. Getlowerbound (1);//0            //Gets the total number of elements of all dimensions            int mplen = MP. LENGTH;//6            int pointlen = point. LENGTH;//12            //Gets the number of dimensions            int mprank = MP. RANK;//1            int pointrank = point. Rank;//2

　　Summary
1 array at compile time must determine the element of each dimension element number, this is its biggest flaw, for the runtime to determine the number of elements of a dimension, this data structure can not meet the conditions!
2 when the array is created, the type is strongly typed and must be specified.