c# - Criteria For Calling Two Methods Overloaded Methods? -


i've seen in c# specifications rules overloaded method gets used in call, can't seem find on criteria needs satisfied method overloaded method.

here shot @ it. please let me know if see problems it:

this not take access modifiers or generics consideration (i'm still noob working way through c# book)

consider 2 methods

  • make sure both methods have correct formal parameter lists
  • treat optional parameters mandatory parameters
  • treat params 1 mandatory parameter type type of params array
  • we have 2 lists of mandatory parameters
  • (p1, p2, p3, p4) , (q1, q2, q3, q4)
  • p1 , q1, p2 , q2, … parameter pairs
  • to overloaded methods, 2 must have same name different parameter list

one of these must false

  • same number of parameters
  • each parameter pair must have same type
  • each parameter pair must both have parameter-modifier or both not have parameter modifier.

example: method(ref int a) , method(out int a) not overloaded methods

  • both 1 parameter
  • both int
  • both have parameter modifier

normally "method overloading" refers methods same name (including +/- operators) different arguments.

the term "overloaded" not strictly defined mean specific in c# language (unlike "method signature"). closes place definition section "3.6 signatures , overloading" of c# 4.0 specification:

signatures enabling mechanism overloading of members in classes, structs, , interfaces:

  • overloading of methods permits class, struct, or interface declare multiple methods same name, provided signatures unique within class, struct, or interface.

  • overloading of instance constructors permits class or struct declare multiple instance constructors, provided signatures unique within class or struct.

  • overloading of indexers permits class, struct, or interface declare multiple indexers, provided signatures unique within class, struct, or interface.

  • overloading of operators permits class or struct declare multiple operators same name, provided signatures unique within class or struct.


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