Nullability of reference types in return type of 'IEnumerator<KeyValuePair<string, object?>> ParametersBase.GetEnumerator()' doesn't match implicitly implemented member 'IEnumerator<KeyValuePair<string, object>> IEnumerable<KeyValuePair<string, object>>.GetEnumerator()'.

Possible null reference return.

Possible null reference assignment.

Possible null reference assignment.

Argument of type 'List<KeyValuePair<string, object?>>' cannot be used for parameter 'parameters' of type 'IEnumerable<KeyValuePair<string, object>>' in 'bool ParametersExtensions.ContainsKey(IEnumerable<KeyValuePair<string, object>> parameters, string key)' due to differences in the nullability of reference types.

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Argument of type 'List<KeyValuePair<string, object?>>' cannot be used for parameter 'parameters' of type 'IEnumerable<KeyValuePair<string, object>>' in 'T ParametersExtensions.GetValue<T>(IEnumerable<KeyValuePair<string, object>> parameters, string key)' due to differences in the nullability of reference types.

Argument of type 'List<KeyValuePair<string, object?>>' cannot be used for parameter 'parameters' of type 'IEnumerable<KeyValuePair<string, object>>' in 'IEnumerable<T> ParametersExtensions.GetValues<T>(IEnumerable<KeyValuePair<string, object>> parameters, string key)' due to differences in the nullability of reference types.

Argument of type 'List<KeyValuePair<string, object?>>' cannot be used for parameter 'parameters' of type 'IEnumerable<KeyValuePair<string, object>>' in 'bool ParametersExtensions.TryGetValue<T>(IEnumerable<KeyValuePair<string, object>> parameters, string key, out T value)' due to differences in the nullability of reference types.

Nullability of reference types in return type of 'IEnumerator<KeyValuePair<string, object?>> ParametersBase.GetEnumerator()' doesn't match implicitly implemented member 'IEnumerator<KeyValuePair<string, object>> IEnumerable<KeyValuePair<string, object>>.GetEnumerator()'.