This post covers all the .NET related articles covered as part of C# Tips & Tricks series and C# compiler errors in DeveloperPublish.com
List of C# Compiler Errors
- C# Error CS0513 – ‘function’ is abstract but it is contained in nonabstract class ‘class’
- C# Error CS0509 – ‘class1’ : cannot derive from sealed type ‘class2’
- C# Error CS0508 – ‘Type 1’: return type must be ‘Type 2’ to match overridden member ‘Member Name’
- C# Error CS0507 – ‘function1’ : cannot change access modifiers when overriding ‘access’ inherited member ‘function2’
- C# Error CS0506 – ‘function1’ : cannot override inherited member ‘function2’ because it is not marked “virtual”, “abstract”, or “override”
- C# Error CS0505 – ‘member1’: cannot override because ‘member2’ is not a function
- C# Error CS0504 – The constant ‘variable’ cannot be marked static
- C# Error CS0503 – The abstract method ‘method’ cannot be marked virtual
- C# Error CS0502 – ‘member’ cannot be both abstract and sealed
- C# Error CS0501 – ‘member function’ must declare a body because it is not marked abstract, extern, or partial
- C# Error CS0500 – ‘class member’ cannot declare a body because it is marked abstract
- C# Error CS0470 – ‘method’ cannot implement interface accessor ‘accessor’ for type ‘type’. Use an explicit interface implementation
- C# Error CS0463 – Evaluation of the decimal constant expression failed with error: ‘error’
- C# Error CS0446 – Foreach cannot operate on a ‘Method or Delegate’
- C# Error CS0443 – Syntax error, value expected
- C# Error CS0442 – ‘Property’: abstract properties cannot have private accessors
- C# Error CS0441 – ‘class’: a class cannot be both static and sealed
- C# Error CS0439 – An extern alias declaration must precede all other elements defined in the namespace
- C# Error CS0433 – The type TypeName1 exists in both TypeName2 and TypeName3
- C# Error CS0432 – Alias ‘identifier’ not found
- C# Error CS0431 – Cannot use alias ‘identifier’ with ‘::’ since the alias references a type. Use ‘.’ instead
- C# Error CS0426 – The type name ‘identifier’ does not exist in the type ‘type’
- C# Error CS0418 – ‘class name’: an abstract class cannot be sealed or static
- C# Error CS0404 – ‘<' unexpected : attributes cannot be generic
- C# Error CS0316 – The parameter name ‘name’ conflicts with an automatically-generated parameter name
- C# Error CS0283 – The type ‘type’ cannot be declared const
- C# Error CS0277 – ‘class’ does not implement interface member ‘accessor’. ‘class accessor’ is not public
- C# Error CS0276 – ‘property/indexer’: accessibility modifiers on accessors may only be used if the property or indexer has both a get and a set accessor
- C# Error CS0275 – ‘accessor’: accessibility modifiers may not be used on accessors in an interface
- C# Error CS0274 – Cannot specify accessibility modifiers for both accessors of the property or indexer ‘property/indexer’
- C# Error CS0273 – The accessibility modifier of the ‘property_accessor’ accessor must be more restrictive than the property or indexer ‘property’
- C# Error CS0272 – The property or indexer ‘property/indexer’ cannot be used in this context because the set accessor is inaccessible
- C# Error CS0271 – The property or indexer ‘property/indexer’ cannot be used in this context because the get accessor is inaccessible
- C# Error CS0270 – Array size cannot be specified in a variable declaration
- C# Error CS0269 – Use of unassigned out parameter ‘parameter’
- C# Error CS0267 – The partial modifier can only appear immediately before ‘class’, ‘record’, ‘struct’, ‘interface’, or a method return type
- C# Error CS0266 – Cannot implicitly convert type ‘type1’ to ‘type2’
- C# Error CS0264 – Partial declarations of ‘type’ must have the same type parameter names in the same order
- C# Error CS0263 – Partial declarations of ‘type’ must not specify different base classes
- C# Error CS0262 – Partial declarations of ‘type’ have conflicting accessibility modifiers
- C# Error CS0261 – Partial declarations of ‘type’ must be all classes, all structs, or all interfaces
- C# Error CS0260 – Missing partial modifier on declaration of type ‘type’; another partial declaration of this type exists
- C# Error CS0255 – stackalloc may not be used in a catch or finally block
- CS0250 – Do not directly call your base class Finalize method. It is called automatically from your destructor
- C# Error CS0249 – Do not override object.Finalize. Instead, provide a destructor
- C# Error CS0248 – Cannot create an array with a negative size
- C# Error CS0247 – Cannot use a negative size with stackalloc
- C# Error CS0246 – The type or namespace name ‘type/namespace’ could not be found
- C# Error CS0245 – Destructors and object.Finalize cannot be called directly
- C# Error CS0244 – Neither ‘is’ nor ‘as’ is valid on pointer types
- C# Error CS0243 – The Conditional attribute is not valid on ‘method’ because it is an override method
- C# Error CS0239 – ‘member’ : cannot override inherited member ‘inherited member’ because it is sealed
- C# Error CS0238 – ‘member’ cannot be sealed because it is not an override
- C# Error CS0236 – A field initializer cannot reference the non-static field, method, or property ‘name’
- C# Error CS0234 – The type or namespace name ‘name’ does not exist in the namespace ‘namespace’
- C# Error CS0231 – A params parameter must be the last parameter in a formal parameter list
- C# Error CS0230 – Type and identifier are both required in a foreach statement
- C# Error CS0226 – An __arglist expression may only appear inside of a call or new expression
- C# Error CS0225 – The params parameter must be a single dimensional array
- C# Error CS0221 – Constant value ‘value’ cannot be converted to a ‘type’ (use ‘unchecked’ syntax to override)
- C# Error CS0220 – The operation overflows at compile time in checked mode
- C# Error CS0216 – The operator ‘operator’ requires a matching operator ‘missing_operator’ to also be defined
- C# Error CS0215 – The return type of operator True or False must be bool
- C# Error CS0206 – A property or indexer may not be passed as an out or ref parameter
- C# Error CS0205 – Cannot call an abstract base member: ‘method’
- C# Error CS0204 – Only 65534 locals, including those generated by the compiler, are allowed
- C# Error CS0202 – foreach requires that the return type ‘type’ of ‘type.GetEnumerator()’
- C# Error CS0201 – Only assignment, call, increment, decrement, and new object expressions can be used as a statement
- C# Error CS0200 – Property or indexer ‘property’ cannot be assigned to — it is read only
- C# Error CS0199 – Fields of static readonly field ‘name’ cannot be passed ref or out
- C# Error CS0198 – Fields of static readonly field ‘name’ cannot be assigned to
- C# Error CS0196 – A pointer must be indexed by only one value
- C# Error CS0193 – The * or -> operator must be applied to a pointer
- C# Error CS0192 – Fields of static readonly field ‘name’ cannot be passed ref or out (except in a static constructor)
- C# Error CS0191 – Property or indexer ‘name’ cannot be assigned to — it is read only
- C# Error CS0188 – The ‘this’ object cannot be used before all of its fields are assigned to
- C# Error CS0186 – Use of null is not valid in this context
- C# Error CS0185 – ‘type’ is not a reference type as required by the lock statement
- C# Error CS0182 – An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type
- C# Error CS0181 – Attribute constructor parameter ‘value’ has type ‘decimal’, which is not a valid attribute parameter type
- C# Error CS0180 – ‘member’ cannot be both extern and abstract
- C# Error CS0179 – ‘member’ cannot be extern and declare a body
- C# Error CS0178 – Invalid rank specifier: expected ‘,’ or ‘]’
- C# Error CS0177 – The out parameter ‘parameter’ must be assigned to before control leaves the current method
- C# Error CS0176 – Static member ‘member’ cannot be accessed with an instance reference; qualify it with a type name instead
- C# Error CS0175 – Use of keyword ‘base’ is not valid in this context
- C# Error CS0173 – Type of conditional expression cannot be determined because there is no implicit conversion between ‘class1’ and ‘class2’
- C# Error CS0171 – Field ‘name’ must be fully assigned before control is returned to the caller
- C# Error CS0170 – Use of possibly unassigned field ‘field’
- C# Error CS0165 – Use of unassigned local variable ‘name’
- C# Error CS0163 – Control cannot fall through from one case label (‘label’) to another
- C# Error CS0161 – ‘method’: not all code paths return a value
- C# Error CS0160 – A previous catch clause already catches all exceptions of this or of a super type (‘type’)
- C# Error CS0159 – No such label ‘label’ within the scope of the goto statement
- C# Error CS0157 – Control cannot leave the body of a finally clause
- C# Error CS0156 – A throw statement with no arguments is not allowed outside of a catch clause
- C# Error CS0155 – The type caught or thrown must be derived from System.Exception
- C# Error CS0154 – The property or indexer ‘property’ cannot be used in this context because it lacks the get accessor
- C# Error CS0153 – A goto case is only valid inside a switch statement
- C# Error CS0152 – The switch statement contains multiple cases with the label value
