System.CodeDom.Compiler.CodeValidator.ValidateArity C# (CSharp) Method

        private static void ValidateArity(CodeTypeReference e) {
            // Verify that the number of TypeArguments agrees with the arity on the type.  
            string baseType = e.BaseType;
            int totalTypeArgs = 0;
            for (int i=0; i<baseType.Length; i++) {
                if (baseType[i] == '`') {
                    i++;    // skip the '
                    int numTypeArgs = 0;
                    while (i < baseType.Length && baseType[i] >= '0' && baseType[i] <='9') {
                        numTypeArgs = numTypeArgs*10 + (baseType[i] - '0');
                        i++;
                    }
            
                    totalTypeArgs += numTypeArgs;
                }
            }

            // Check if we have zero type args for open types.
            if ((totalTypeArgs != e.TypeArguments.Count) && (e.TypeArguments.Count != 0)) {
                throw new ArgumentException(SR.GetString(SR.ArityDoesntMatch, baseType, e.TypeArguments.Count));
            }
        }