 | Abstract member cannot be declared in nonabstract class | | Abstract member cannot be private | | Abstract member cannot be marked as sealed |
| Abstract member cannot be marked as virtual | | Abstract member cannot declare a body | | Anonymous method cannot have 'params' parameter |
| Array elements cannot be of static type | | Base type constructors are not implemented | | Cannot create an instance of abstract class |
| Cannot create an instance of interface | | Cannot create an instance of static class | | Cannot declare instance member in a static class |
| Cannot declare variable of static type | | Cannot inherit from sealed type | | Cannot inherit from special class 'System.ValueType' |
| Cannot inherit from static class | | Cannot override inherited sealed member | | Cannot yield in the body of a catch clause |
| Cannot yield in the body of a finally clause | | Cannot yield in the body of a try block with a catch clause | | Constant cannot be marked static |
| Constructor cannot call itself | | Constructor must declare a body | | Control cannot leave the body of a finally clause |
| Delegate cannot be marked static | | Destructor must declare a body | | Interface events cannot have add or remove accessors |
| Extension method cannot have a parameter array used with 'this' modifier | | Extension methods cannot extend System.Type | | Extension method must be defined in a non-generic static class |
| Extension method must be defined in a top level static class | | Extern member cannot declare a body | | Format item index too large |
| Generic class cannot derive from Attribute | | Indexer cannot be static | | Interface cannot contain constructors |
| Interface member cannot have a definition | | Interface expected | | Keyword "base" is not valid in a static member |
| Keyword this/Me is not valid in a static member | | Lambda expression cannot have 'params' parameter | | Member cannot be sealed because it is not an override |
| Member must declare a body because it is not marked abstract or extern | | Member names cannot be the same as their enclosing type | | Method must have a return type |
| Only class types can contain destructors | | Operator cannot be abstract | | Operator cannot have 'params' parameter |
| Operator must be declared static and public | | Operator must declare a body | | Overloaded unary operator takes one parameter |
| Override member cannot be marked as new | | Override member cannot be marked as virtual | | Override member cannot change access rights |
| Parameter modifier 'this' should be the first parameter of extension method | | Partial method cannot have access modifiers or the virtual, abstract, override, new, sealed, or extern modifiers | | Partial method cannot have out parameters |
| Partial method must be declared within a partial class or partial struct | | Property cannot have void type | | Protected member cannot be declared in struct |
| Protected member in sealed type will be private | | Sealed class cannot be abstract | | Static class cannot be abstract |
| Static class cannot be sealed | | Static class cannot contain protected member | | Static constructors cannot have access modifiers |
| Static constructors must be parameterless | | Struct cannot contain parameterless constructor | | The params parameter must be a single dimensional array |
| The params parameter must be the last parameter in a formal parameter list | | Try statement without catch or finally | | Undeclared element |
| Virtual member cannot be private | | Virtual member cannot be declared in sealed class | | Virtual member cannot be declared in structures |