The result of the expression is always 'true' since a value of type 'DateTime' is never equal to 'null' of type 'DateTime?'

This call site is reachable on all platforms. 'Cell.Tag' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'IView.BackColor' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'CellContext.Cell' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Cell.Tag' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'ColumnInfoCollection.this[int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'CellContext.Value' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Grid.this[int, int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'ColumnInfoCollection.this[int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Grid.Columns' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)