Default Values Table (C# Reference)
The following table shows the default values of value types returned by the default constructors. Default constructors are invoked by using the new operator, as follows:
int myInt = new int();
The preceding statement has the same effect as the following statement:
int myInt = 0;
Remember that using uninitialized variables in C# is not allowed.
The value produced by the expression (E)0, where E is the enum identifier.
The value produced by setting all value-type fields to their default values and all reference-type fields to null.