The variable 'e' is declared but never used

The variable 'ex' is declared but never used

The variable 'ex' is declared but never used

Possible null reference argument for parameter 'value' in 'ImmutableDictionary<string, object> ImmutableDictionary<string, object>.SetItem(string key, object value)'.

Possible null reference argument for parameter 'value' in 'ImmutableDictionary<string, object> ImmutableDictionary<string, object>.Add(string key, object value)'.

Converting null literal or possible null value to non-nullable type.

Possible null reference assignment.

The variable 'e' is declared but never used

The variable 'ex' is declared but never used

The variable 'ex' is declared but never used

The variable 'e' is declared but never used

The variable 'ex' is declared but never used

The variable 'ex' is declared but never used

Possible null reference argument for parameter 'value' in 'ImmutableDictionary<string, object> ImmutableDictionary<string, object>.SetItem(string key, object value)'.

Possible null reference argument for parameter 'value' in 'ImmutableDictionary<string, object> ImmutableDictionary<string, object>.Add(string key, object value)'.

Converting null literal or possible null value to non-nullable type.