C# Generic Constraints
C# allows you to use constraints to restrict client code to specify certain types while instantiating generic types. It will give a compile-time error if you try to instantiate a generic type using a type that is not allowed by the specified constraints. You can specify one or more constraints on the generic type using the where clause after the generic type name. Syntax: GenericTypeName < T > where T: contraint1 , constraint2 The following example demonstrates a generic class with a constraint to reference types when instantiating the generic class. Example: Declare Generic Constraints class DataStore < T > where T : class { public T Data { get ; set ; } } Above, we applied the class constraint, which means only a reference type can be passed as an argument while creating the DataStore class object. So, you can pass reference types such as class, interface, delegate, or array type. Passing value types will give a compile-time error, so we cannot pass p...