Learn to use C multidimensional arrays

 
String[, ,] items = 
new String[,,] { 
{ 
{ "A1", "A2", "A3", " Do things ", " a. " }, 
{ "B1", "B2", "B3", " Do things ", " a. " }, 
{ "C1", "C2", "C3", " Do things ", " a. " }, 
{ "D1", "D2", "D3", " Do things ", " a. " } 
}, { 
{ "E1", "E2", "E3", " Do things ", " a. " }, 
{ "F1", "F2", "F3", " Do things ", " a. " }, 
{ "G1", "G2", "G3", " Do things ", " a. " }, 
{ "H1", "H2", "H3", " Do things ", " a. " } 
} 
}; 

Code:

 
System.Console.WriteLine("Items.Rank =" + items.Rank); 
System.Console.WriteLine("Items.GetUpperBound(0)=" + items.GetUpperBound(0)); 
System.Console.WriteLine("Items.GetUpperBound(1)=" + items.GetUpperBound(1)); 
System.Console.WriteLine("Items.GetUpperBound(2)=" + thirdItems.GetUpperBound(items.Rank - 1)); 

System.Console.WriteLine("Items[0, 0, 0]=" + items[0, 0, 0]); 
System.Console.WriteLine("Items[0, 0, 1]=" + items[0, 0, 1]); 
System.Console.WriteLine("Items[0, 0, 2]=" + items[0, 0, 2]); 
System.Console.WriteLine("Items[0, 0, 3]=" + items[0, 0, 3]); 
System.Console.WriteLine("Items[0, 0, 4]=" + items[0, 0, 4]); 

System.Console.WriteLine("Items[0, 1, 0]=" + items[0, 1, 0]); 
System.Console.WriteLine("Items[0, 2, 0]=" + items[0, 1, 1]); 
System.Console.WriteLine("Items[0, 2, 0]=" + items[0, 1, 2]); 
System.Console.WriteLine("Items[0, 2, 0]=" + items[0, 1, 3]); 
System.Console.WriteLine("Items[0, 2, 0]=" + items[0, 1, 4]); 

The operation results are as follows:

 
Items.Rank =3 
Items.GetUpperBound(0)=1 
Items.GetUpperBound(1)=3 
Items.GetUpperBound(2)=4 
Items[0, 0, 0]=A1 
Items[0, 0, 1]=A2 
Items[0, 0, 2]=A3 
Items[0, 0, 3]= Do things  
Items[0, 0, 4]= a.  
Items[0, 1, 0]=B1 
Items[0, 2, 0]=B2 
Items[0, 2, 0]=B3 
Items[0, 2, 0]= Do things  
Items[0, 2, 0]= a.  

Among them:
GetUpperBound(0) returns the upper limit of the index of the first dimension of the array, GetUpperBound(i) returns the upper limit of the i+1 dimension of the array, and GetUpperBound(Rank-1) returns the upper limit of the last one dimension of the array, which is the number of columns minus 1